The sulfate minerals are a class of mineral

Mineral

A mineral is a naturally occurring solid chemical substance formed through biogeochemical processes, having characteristic chemical composition, highly ordered atomic structure, and specific physical properties. By comparison, a rock is an aggregate of minerals and/or mineraloids and does not...

s which include the sulfate ion (SO₄^2-) within their structure. The sulfate minerals occur commonly in primary evaporite

Evaporite

Evaporite is a name for a water-soluble mineral sediment that result from concentration and crystallization by evaporation from an aqueous solution. There are two types of evaporate deposits, marine which can also be described as ocean deposits, and non-marine which are found in standing bodies of...

 depositional environments, as gangue

Gangue

In mining, gangue is the commercially worthless material that surrounds, or is closely mixed with, a wanted mineral in an ore deposit. The separation of mineral from gangue is known as mineral processing, mineral dressing or ore dressing and it is a necessary and often significant aspect of mining...

 minerals in hydrothermal veins

Vein (geology)

In geology, a vein is a distinct sheetlike body of crystallized minerals within a rock. Veins form when mineral constituents carried by an aqueous solution within the rock mass are deposited through precipitation...

 and as secondary minerals in the oxidizing

Redox

Redox reactions describe all chemical reactions in which atoms have their oxidation state changed....

 zone of sulfide mineral

Sulfide mineral

The sulfide minerals are a class of minerals containing sulfide as the major anion. Some sulfide minerals are economically important as metal ores. The sulfide class also includes the selenides, the tellurides, the arsenides, the antimonides, the bismuthinides, the sulfarsenides and the sulfosalts...

 deposits. The chromate

Chromate

Chromate salts contain the chromate anion, CrO42−. Dichromate salts contain the dichromate anion, Cr2O72−. They are oxyanions of chromium in the oxidation state +6. They are moderately strong oxidizing agents.- Chemical properties :...

 and manganate

Manganate

In inorganic nomenclature, a manganate is any negatively charged molecular entity with manganese as the central atom. However, the name is usually used to refer to the tetraoxidomanganate anion, MnO, also known as manganate because it contains manganese in the +6 oxidation state...

 minerals have a similar structure and are often included with the sulfates in mineral classification systems.
Sulfate minerals include:

• Anhydrous sulfates
  • Barite
    Barite
    Baryte, or barite, is a mineral consisting of barium sulfate. The baryte group consists of baryte, celestine, anglesite and anhydrite. Baryte itself is generally white or colorless, and is the main source of barium...
    
     BaSO₄
  • Celestite
    Celestite
    Celestine or celestite is a mineral consisting of strontium sulfate. The mineral is named for its occasional delicate blue color.-Occurrence:Celestine occurs as crystals, and also in compact massive and fibrous forms...
    
     SrSO₄
  • Anglesite
    Anglesite
    Anglesite is a lead sulfate mineral with the chemical formula PbSO4. It occurs as an oxidation product of primary lead sulfide ore, galena. Anglesite occurs as prismatic orthorhombic crystals and earthy masses, and is isomorphous with barite and celestine. It contains 74% of lead by mass and...
    
     PbSO₄
  • Anhydrite
    Anhydrite
    Anhydrite is a mineral – anhydrous calcium sulfate, CaSO4. It is in the orthorhombic crystal system, with three directions of perfect cleavage parallel to the three planes of symmetry. It is not isomorphous with the orthorhombic barium and strontium sulfates, as might be expected from the...
    
     CaSO₄
  • Hanksite
    Hanksite
    Hanksite is a sulfate mineral, distinguished as one of only a handful that contain both carbonate and sulfate ion groups. It has the chemical formula: Na22K92Cl.-Occurrence:...
    
     Na₂₂K(SO₄)₉(CO₃)₂Cl
• Hydroxide and hydrous sulfates
  • Gypsum
    Gypsum
    Gypsum is a very soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO4·2H2O. It is found in alabaster, a decorative stone used in Ancient Egypt. It is the second softest mineral on the Mohs Hardness Scale...
    
     CaSO₄·2H₂O
  • Chalcanthite
    Chalcanthite
    Chalcanthite, whose name derives from the Greek, chalkos and anthos, meaning copper flower, is a richly-colored blue/green water-soluble sulfate mineral CuSO4·5H2O. It is commonly found in the late-stage oxidation zones of copper deposits...
    
     CuSO₄·5H₂O
  • Kieserite
    Kieserite
    Kieserite is a highly unstable magnesium sulfate mineral . It has a vitreous luster and it is colorless, grayish-white or yellowish. Its hardness is 3.5 and it has a monoclinic crystal system...
    
     MgSO₄·H₂O
  • Starkeyite MgSO₄·4H₂O
  • Hexahydrite MgSO₄·6H₂O
  • Epsomite
    Epsomite
    Epsomite is a hydrous magnesium sulfate mineral with formula MgSO4·7H2O or simply MgSO4. Epsomite forms as encrustations or efflorescences on limestone cavern walls and mine timbers and walls, as a volcanic fumaroles, and as rare beds in evaporate layers...
    
     MgSO₄·7H₂O
  • Meridianiite
    Meridianiite
    Meridianiite — MgSO4•11H2O — is the crystalline 11-hydrate magnesium sulfate phase that precipitates from solutions saturated in Mg2+ and SO42- ions at temperatures ≥ 2 ˚C...
    
     MgSO₄·11H₂O
  • Melanterite
    Melanterite
    Melanterite is a mineral form of hydrous iron sulfate: FeSO4·7H2O. It is the iron analogue of the copper sulfate chalcanthite. It alters to siderotil by loss of water. It is a secondary sulfate mineral which forms from the oxidation of primary sulfide minerals such as pyrite and marcasite in the...
    
     FeSO₄·7H₂O
  • Antlerite
    Antlerite
    Antlerite is a greenish hydrous copper sulfate mineral, with the formula Cu34. It occurs in tabular, acicular, or fibrous crystals with a vitreous luster...
    
     Cu₃SO₄(OH)₄
  • Brochantite
    Brochantite
    Brochantite is a sulfate mineral, one of a number of cupric sulfates. Its chemical formula is CuSO4·3Cu2. Formed in arid climates or in rapidly oxidizing copper sulfide deposits, it is named for its discoverer, the French geologist and mineralogist, A. J. M...
    
     Cu₄SO₄(OH)₆
  • Alunite
    Alunite
    Alunite is a sulfate mineral that was first observed in the 15th century in Monti della Tolfa, north of Rome, where it was mined for the manufacture of alum. First called aluminilite by J.C. Delamétherie in 1797, this name was contracted by François Beudant in 1824 to alunite.Distinct crystals of...
    
     KAl₃(SO₄)₂(OH)₆
  • Jarosite
    Jarosite
    Jarosite is a basic hydrous sulfate of potassium and iron with a chemical formula of KFe3+362. This sulfate mineral is formed in ore deposits by the oxidation of iron sulfides...
    
     KFe₃(SO₄)₂(OH)₆

Nickel–Strunz Classification -07- Sulfates

IMA

International Mineralogical Association

The International Mineralogical Association is an international group of 38 national societies. The goal is to promote the science of mineralogy and to standardize the nomenclature of the 4000 plus known mineral species...

-CNMNC proposes a new hierarchical scheme (Mills et al., 2009). This list uses it to modify the Classification of Nickel–Strunz

Strunz classification

Nickel–Strunz classification is a scheme for categorizing minerals based upon their chemical composition, introduced by German mineralogist Karl Hugo Strunz in his 1941 Mineralogische Tabellen. The 4th edition was edited by Christel Tennyson too . It was followed by A.S...

 (10 ed, pending publication).

• Abbreviations:
  • "*" - discredited (IMA/CNMNC status).
  • "?" - questionable/doubtful (IMA/CNMNC status).
  • "REE" - Rare-earth element
    Rare earth element
    As defined by IUPAC, rare earth elements or rare earth metals are a set of seventeen chemical elements in the periodic table, specifically the fifteen lanthanides plus scandium and yttrium...
    
     (Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu)
  • "PGE" - Platinum-group element
    Platinum group
    The platinum group metals is a term used sometimes to collectively refer to six metallic elements clustered together in the periodic table.These elements are all transition metals, lying in the d-block .The six...
    
     (Ru, Rh, Pd, Os, Ir, Pt)
  • 03.C Aluminofluorides, 06 Borates, 08 Vanadates (04.H V^[5,6] Vanadates), 09 Silicates:
    • Neso: insular (from Greek
      Greek language
      Greek is an independent branch of the Indo-European family of languages. Native to the southern Balkans, it has the longest documented history of any Indo-European language, spanning 34 centuries of written records. Its writing system has been the Greek alphabet for the majority of its history;...
      
       νησος nēsos, island)
    • Soro: grouping (from Greek
      Greek language
      Greek is an independent branch of the Indo-European family of languages. Native to the southern Balkans, it has the longest documented history of any Indo-European language, spanning 34 centuries of written records. Its writing system has been the Greek alphabet for the majority of its history;...
      
       σωροῦ sōros, heap, mound (especially of corn))
    • Cyclo: ring
    • Ino: chain (from Greek
      Greek language
      Greek is an independent branch of the Indo-European family of languages. Native to the southern Balkans, it has the longest documented history of any Indo-European language, spanning 34 centuries of written records. Its writing system has been the Greek alphabet for the majority of its history;...
      
       ις [genitive: ινος inos], fibre)
    • Phyllo: sheet (from Greek
      Greek language
      Greek is an independent branch of the Indo-European family of languages. Native to the southern Balkans, it has the longest documented history of any Indo-European language, spanning 34 centuries of written records. Its writing system has been the Greek alphabet for the majority of its history;...
      
       φύλλον phyllon, leaf)
    • Tekto: three-dimensional framework
• Nickel–Strunz code scheme: NN.XY.##x
  • NN: Nickel–Strunz mineral class number
  • X: Nickel–Strunz mineral division letter
  • Y: Nickel–Strunz mineral family letter
  • ##x: Nickel–Strunz mineral/group number, x add-on letter

Class: sulfates, selenates, tellurates

• 07.A Sulfates (selenates, etc.) without Additional Anions, without H₂O
  • 07.AB With medium-sized cations: 05 Millosevichite
    Millosevichite
    Millosevichite is a rare mineral with the chemical formula Al23. Aluminium is often substituted by iron. It forms white to yellowish cryptocrystalline, often porous, masses. The mineral is mainly known from burning coal dumps, acting as one of the main minerals forming sulfate crust. It can be also...
    
    , 05 Mikasaite; 10 Chalcocyanite, 10 Zincosite*
  • 07.AC With medium-sized and large cations: IMA2008-029, 05 Vanthoffite; 10 Efremovite
    Efremovite
    Efremovite is a rare ammonium sulfate mineral with the chemical formula: 2Mg23. It is a white to gray cubic mineral. This anhydrous sulfate occurs as constituent in sulfate crusts of burning coal dumps...
    
    , 10 Manganolangbeinite, 10 Langbeinite
    Langbeinite
    Langbeinite is a potassium magnesium sulfate mineral with formula: K2Mg23. Langbeinite crystallizes in the isometric - tetartoidal system as transparent colorless or white with pale tints of yellow to green and violet crystalline masses. It has a vitreous luster. The Mohs hardness is 3.5 to 4 and...
    
    ; 15 Eldfellite, 15 Yavapaiite; 20 Godovikovite
    Godovikovite
    Godovikovite is a rare mineral of the chemical formula: Al2. Al can partially be substituted by Fe. Hydratation of godovikovite gives the ammonium alum, tschermigite. The mineral forms cryptocrystalline, often porous, masses, usually of white colour. Single crystals are very small hexagonal blades....
    
    , 20 Sabieite
    Sabieite
    Sabieite is a mineral with the chemical formula Fe3+2. It is found in South Africa. Its crystals are trigonal to trapezohedral. It is white and leaves a white streak. It is transparent and has an earthy luster. Sabieite is rated 2 on the Mohs Scale....
    
    ; 25 Thenardite
    Thenardite
    Thenardite is an anhydrous sodium sulfate mineral, Na2SO4 which occurs in arid evaporite environments. It also occurs in dry caves and old mine workings as an efflorescence and as a crusty deposit around fumaroles. It occurs in volcanic caves on Mt...
    
    , 35 Aphthitalite
    Aphthitalite
    Aphthitalite is a potassium sulfate mineral with the chemical formula: 3Na2.It was first described in 1835 for an occurrence on Mt. Vesuvius, Italy. The name is from the Greek άφθητος, "unalterable", and άλας, "salt", for its stability in air...
    
    
  • 07.AD With only large cations: 05 Arcanite
    Arcanite
    Arcanite is a potassium sulfate mineral with formula: K2SO4.Arcanite was first described in 1845 for an occurrence in old pine railroad ties in the Santa Ana tin mine, Trabuco Canyon, Santa Ana Mountains, Orange County, California, USA...
    
    , 05 Mascagnite
    Mascagnite
    Mascagnite is a rare ammonium sulfate mineral 2SO4. It crystallizes in the orthorhombic system typically forming as stalactitic masses exhibiting good cleavage. It is soft and water soluble...
    
    ; 10 Mercallite, 15 Misenite, 20 Letovicite, 25 Glauberite
    Glauberite
    Glauberite is a sodium calcium sulfate mineral with the formula Na2Ca2, which forms as an evaporite. It is named for the closely related Glauber's salts. Because of its solubility, glauberite is often dissolved away from the crystal matrix leaving a mould into which other minerals are deposited...
    
    , 30 Anhydrite
    Anhydrite
    Anhydrite is a mineral – anhydrous calcium sulfate, CaSO4. It is in the orthorhombic crystal system, with three directions of perfect cleavage parallel to the three planes of symmetry. It is not isomorphous with the orthorhombic barium and strontium sulfates, as might be expected from the...
    
    ; 35 Anglesite
    Anglesite
    Anglesite is a lead sulfate mineral with the chemical formula PbSO4. It occurs as an oxidation product of primary lead sulfide ore, galena. Anglesite occurs as prismatic orthorhombic crystals and earthy masses, and is isomorphous with barite and celestine. It contains 74% of lead by mass and...
    
    , 35 Barite
    Barite
    Baryte, or barite, is a mineral consisting of barium sulfate. The baryte group consists of baryte, celestine, anglesite and anhydrite. Baryte itself is generally white or colorless, and is the main source of barium...
    
    , 35 Celestine, 35 Radiobarite*, 35 Olsacherite; 40 Kalistrontite, 40 Palmierite
• 07.B Sulfates (selenates, etc.) with Additional Anions, without H₂O
  • 07.BB With medium-sized cations: 05 Caminite, 10 Hauckite, 15 Antlerite
    Antlerite
    Antlerite is a greenish hydrous copper sulfate mineral, with the formula Cu34. It occurs in tabular, acicular, or fibrous crystals with a vitreous luster...
    
    , 20 Dolerophanite, 25 Brochantite
    Brochantite
    Brochantite is a sulfate mineral, one of a number of cupric sulfates. Its chemical formula is CuSO4·3Cu2. Formed in arid climates or in rapidly oxidizing copper sulfide deposits, it is named for its discoverer, the French geologist and mineralogist, A. J. M...
    
    , 30 Vergasovaite, 35 Klebelsbergite, 40 Schuetteite, 45 Paraotwayite, 50 Xocomecatlite
    Xocomecatlite
    Xocomecatlite is a rare tellurate mineral with formula: Cu34. It is an orthorhombic mineral which occurs as aggregates or spherules of green needlelike crystals....
    
    , 55 Pauflerite
  • 07.BC With medium-sized and large cations: 05 Dansite; 10 Alunite
    Alunite
    Alunite is a sulfate mineral that was first observed in the 15th century in Monti della Tolfa, north of Rome, where it was mined for the manufacture of alum. First called aluminilite by J.C. Delamétherie in 1797, this name was contracted by François Beudant in 1824 to alunite.Distinct crystals of...
    
    , 10 Ammonioalunite, 10 Ammoniojarosite, 10 Beaverite, 10 Argentojarosite, 10 Huangite, 10 Dorallcharite, 10 Jarosite
    Jarosite
    Jarosite is a basic hydrous sulfate of potassium and iron with a chemical formula of KFe3+362. This sulfate mineral is formed in ore deposits by the oxidation of iron sulfides...
    
    , 10 Hydroniumjarosite, 10 Minamiite, 10 Natrojarosite, 10 Natroalunite, 10 Osarizawaite
    Osarizawaite
    Osarizawaite is a greenish yellow mineral with the chemical formula PbCuAl226. It has rhombohedral crystals....
    
    , 10 Plumbojarosite, 10 Walthierite, 10 Schlossmacherite; 15 Yeelimite; 20 Atlasovite, 20 Nabokoite; 25 Chlorothionite; 30 Fedotovite, 30 Euchlorine; 35 Kamchatkite, 40 Piypite; 45 Klyuchevskite-Duplicate, 45 Klyuchevskite, 45 Alumoklyuchevskite; 50 Caledonite
    Caledonite
    Caledonite, whose name derives from Caledonia, the historical name of its place of discovery , is a richly colored blue-green sulfate-carbonate mineral of lead and copper with an orthorhombic crystal structure. It is an uncommon mineral found in the oxidized zones of copper-lead...
    
    , 55 Wherryite, 60 Mammothite; 65 Munakataite, 65 Schmiederite
    Schmiederite
    Schmiederite is a secondary mineral in the oxidized zone of selenium-bearing hydrothermal base metal deposits. Its chemical formula is Pb2Cu24....
    
    , 65 Linarite
    Linarite
    Linarite is a somewhat rare, crystalline mineral that is known among mineral collectors for its unusually intense, pure blue color. It is formed by the oxidation of galena and chalcopyrite and other copper sulfides. It is a combined copper lead sulfate hydroxide with formula PbCuSO42.Linarite...
    
    ; 70 Chenite, 75 Krivovichevite
  • 07.BD With only large cations: 05 Sulphohalite; 10 Galeite, 10 Schairerite; 15 Kogarkoite
    Kogarkoite
    Kogarkoite [Na3F] is a mineral with a usually pale blue color. The specific gravity is about 2.67 and the hardness is 3.5. The crystall system is monoclinic. Kogarkoite is named after the Russian scientist Lia Nikolaevna Kogarko who discovered this mineral....
    
    ; 20 Cesanite
    Cesanite
    Cesanite is the end member of the apatite-wilkeite-ellestadite series that substitutes all of apatite's phosphate ions with sulfate ions and balances the difference in charge by replacing several calcium ions with sodium ions...
    
    , 20 Caracolite; 25 Burkeite, 30 Hanksite
    Hanksite
    Hanksite is a sulfate mineral, distinguished as one of only a handful that contain both carbonate and sulfate ion groups. It has the chemical formula: Na22K92Cl.-Occurrence:...
    
    , 35 Cannonite, 40 Lanarkite
    Lanarkite
    Lanarkite is a mineral, a form of lead sulfate with formula Pb2O. It was originally found at Leadhills in the Scottish county of Lanarkshire, hence the name. It forms white or light green, acicular monoclinic prismatic crystals, usually microscopic in size. It is an oxidation product of...
    
    , 45 Grandreefite
    Grandreefite
    Grandreefite is a secondary lead sulfate-fluoride mineral with a general chemical formula, Pb2SO4F2. It is named for the location in which it was discovered in 1989, Grand Reef Mine in Graham County, Arizona. Grandreefite is monoclinic, falling in the 2/m symmetry group...
    
    , 50 Itoite, 55 Chiluite, 60 Hectorfloresite, 65 Pseudograndreefite, 70 Sundiusite
• 07.C Sulfates (selenates, etc.) without Additional Anions, with H₂O
  • 07.CB With only medium-sized cations: 05 Gunningite
    Gunningite
    Gunningite is one of the minerals in the Kieserite group. Its chemical formula is SO4·H2O. Its name honours Henry Cecil Gunning of the Geological Survey of Canada and a Professor at the University of British Columbia, Vancouver, Canada....
    
    , 05 Dwornikite, 05 Kieserite
    Kieserite
    Kieserite is a highly unstable magnesium sulfate mineral . It has a vitreous luster and it is colorless, grayish-white or yellowish. Its hardness is 3.5 and it has a monoclinic crystal system...
    
    , 05 Szomolnokite, 05 Szmikite, 05 Poitevinite, 05 Cobaltkieserite; 07 Sanderite, 10 Bonattite, 15 Boyleite, 15 Aplowite, 15 Ilesite, 15 Rozenite
    Rozenite
    Rozenite is an uncommon hydrous iron sulfate mineral, Fe2+SO4•4.It occurs as a secondary mineral, formed under low humidity at less than 21 °C as an alteration of copper-free melanterite which is a post mine alteration product of pyrite or marcasite. It also occurs in lacustrine sediments and coal...
    
    , 15 Starkeyite, 15 IMA2002-034; 20 Chalcanthite
    Chalcanthite
    Chalcanthite, whose name derives from the Greek, chalkos and anthos, meaning copper flower, is a richly-colored blue/green water-soluble sulfate mineral CuSO4·5H2O. It is commonly found in the late-stage oxidation zones of copper deposits...
    
    , 20 Jokokuite, 20 Pentahydrite, 20 Siderotil
    Siderotil
    Siderotil is an iron sulfate hydrate mineral with formula: FeSO4·5H2O which forms by the dehydration of melanterite. Copper commonly occurs substituting for iron in the structure. It typically occurs as fibrous or powdery encrustations, but may also occur as acicular triclinic crystals.It was...
    
    ; 25 Bianchite, 25 Ferrohexahydrite, 25 Chvaleticeite, 25 Hexahydrite, 25 Moorhouseite, 25 Nickelhexahydrite; 30 Retgersite; 35 Bieberite, 35 Boothite, 35 Mallardite, 35 Melanterite
    Melanterite
    Melanterite is a mineral form of hydrous iron sulfate: FeSO4·7H2O. It is the iron analogue of the copper sulfate chalcanthite. It alters to siderotil by loss of water. It is a secondary sulfate mineral which forms from the oxidation of primary sulfide minerals such as pyrite and marcasite in the...
    
    , 35 Zincmelanterite, 35 Alpersite; 40 Epsomite
    Epsomite
    Epsomite is a hydrous magnesium sulfate mineral with formula MgSO4·7H2O or simply MgSO4. Epsomite forms as encrustations or efflorescences on limestone cavern walls and mine timbers and walls, as a volcanic fumaroles, and as rare beds in evaporate layers...
    
    , 40 Goslarite
    Goslarite
    Goslarite is a hydrous zinc sulfate mineral with formula: ZnSO4·7H2O. It is a secondary mineral which develops after primary zinc minerals within the zone of oxidation and in old sphalerite mine workings. It is unstable at the surface and dehydrates readily. It is transparent to translucent and...
    
    , 40 Morenosite; 45 Alunogen
    Alunogen
    Alunogen also called feather alum and hair salt is a colourless to white fibrous to needle-like aluminium sulfate mineral often found on the walls of mines and quarries as secondary mineral. It can be found in the oxidation zones of some ore deposits as well as on burning coal dumps Alunogen also...
    
    , 45 Meta-alunogen; 50 Coquimbite, 50 Paracoquimbite; 55 Rhomboclase
    Rhomboclase
    Rhomboclase is an acidic iron sulfate mineral with a formula reported as H5Fe3+O22·2 or HFe2·4. It crystallizes in the orthorhombic system and typically occurs as tabular crystals with a rhombic outline...
    
    , 60 Kornelite, 65 Quenstedtite
    Quenstedtite
    Quenstedtite is an uncommon iron sulfate mineral with formula Fe23·10H20. It forms violet or white triclinic crystals. It and has been found at a couple of localities in Chile. It was named by G. Linck in 1889 after the German mineralogist F. A. von Quenstedt.-References:***...
    
    , 70 Lausenite; 75 Lishizhenite, 75 Romerite; 80 Ransomite; 85 Bilinite
    Bilinite
    Bilinite is an iron sulfate mineral. It is a product of the oxidation of pyrite in water. It is an acidic mineral that has a pH of less than 3 and is harmful to the environment when it comes from acid rock drainage ....
    
    , 85 Apjohnite, 85 Dietrichite, 85 Halotrichite
    Halotrichite
    Halotrichite, also known as feather alum, is a highly hydrated sulfate of aluminium and iron. It is formed by the weathering and decomposition of pyrite commonly near or in volcanic vents. Its chemical formula is FeAl24·22H2O. It forms fibrous monoclinic crystals. The crystals are water...
    
    , 85 Pickeringite, 85 Redingtonite, 85 Wupatkiite; 90 Meridianiite
    Meridianiite
    Meridianiite — MgSO4•11H2O — is the crystalline 11-hydrate magnesium sulfate phase that precipitates from solutions saturated in Mg2+ and SO42- ions at temperatures ≥ 2 ˚C...
    
    , 95 Caichengyunite
  • 07.CC With medium-sized and large cations: 05 Krausite, 10 Tamarugite
    Tamarugite
    Tamarugite is a colorless monoclinic sulfate mineral.Also known as lapparentite.-References:*...
    
    ; 15 Mendozite
    Mendozite
    Mendozite is a sulfate mineral, one of the alum series, with formula NaAl2·11H2O. It is a hydrated form of sodium aluminium sulfate ....
    
    , 15 Kalinite
    Kalinite
    Kalinite is a fibrous monoclinic type of alum distinct from isometric potassium alum, named in 1868. Its name comes from Kalium which is the Latin name for potassium, hence its chemical symbol, "K"...
    
    ; 20 Lonecreekite, 20 Alum-(K), 20 Alum-(Na), 20 Lanmuchangite, 20 Tschermigite
    Tschermigite
    Tschermigite is a mineral form of ammonium alum, formula NH4AlSO4·12H2O. It is found in burning coal seams, bituminous shale and fumaroles. Because of its extreme water solubility it is unlikely to persist except in the dryest of conditions. Discovered in 1852 at Cermiky, also known as Schermig...
    
    ; 25 Pertlikite, 25 Monsmedite?, 25 Voltaite, 25 Zincovoltaite; 30 Krohnkite
    Kröhnkite
    Kröhnkite is a rare copper sulfate mineral named after B. Kröhnke who first researched it.-Crystallography:Kröhnkite has monoclinic symmetry . Monoclinic symmetry implies that the mineral contains three axes of differing length , two of which intersect each other at 90° and one that intersects at...
    
    , 35 Ferrinatrite, 40 Goldichite, 45 Loweite; 50 Blodite
    Blödite
    Blödite is a hydrated sodium magnesium sulfate mineral with formula: Na2Mg2·4H2O.The mineral is clear to yellow in color and forms monoclinic crystals. A synonym for the mineral is bloedite ....
    
    , 50 Changoite, 50 Nickelblodite; 55 Mereiterite, 55 Leonite; 60 Boussingaultite
    Boussingaultite
    Boussingaultite is a rare sulfate mineral of the chemical formula: 2Mg2·6. The formula of boussingaultite is that of Tutton's salts type. It was originally described from geothermal fields in Tuscany, Italy, where it occurs together with its iron analogue mohrite, but is more commonly found on...
    
    , 60 Cyanochroite, 60 Mohrite
    Mohrite
    Mohrite, 2Fe2·6, is a rare sulfate mineral originally found in the geothermal fields of Tuscany, Italy. This Fe-dominant analogue of boussingaultite is sometimes reported from burning coal dumps....
    
    , 60 Picromerite, 60 Nickelboussingaultite; 65 Polyhalite
    Polyhalite
    Polyhalite is an evaporite mineral, a hydrated sulfate of potassium, calcium and magnesium with formula: K2Ca2Mg4·2. Polyhalite crystallizes in the triclinic system although crystals are very rare. The normal habit is massive to fibrous. It is typically colorless, white to gray, although it...
    
    ; 70 Leightonite
    Leightonite
    Leightonite is a rare sulfate mineral with formula of K2Ca2Cu4•2H2O.-Crystal class:Leightonite forms flattened to elongated bladed crystals of variously interpreted crystal structure. It’s crystal system is reported as triclinic morphologically, but also as pseudo-orthorhombic due to intricate...
    
    , 75 Amarillite, 80 Konyaite, 85 Wattevilleite
  • 07.CD With only large cations: 05 Matteuccite, 10 Mirabilite
    Mirabilite
    Mirabilite, also known as Glauber's salt, is a hydrous sodium sulfate mineral with the chemical formula Na2SO4·10H2O. It is a vitreous, colorless to white monoclinic mineral which forms as an evaporite from sodium sulfate bearing brines. It is found around saline springs and along saline playa lakes...
    
    , 15 Lecontite, 20 Hydroglauberite, 25 Eugsterite, 30 Gorgeyite; 35 Koktaite, 35 Syngenite; 40 Gypsum
    Gypsum
    Gypsum is a very soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO4·2H2O. It is found in alabaster, a decorative stone used in Ancient Egypt. It is the second softest mineral on the Mohs Hardness Scale...
    
    , 45 Bassanite, 50 Zircosulfate, 55 Schieffelinite, 60 Montanite, 65 Omongwaite
• 07.D Sulfates (selenates, etc.) with additional anions, with H₂O
  • 07.DB With only medium-sized cations; insular octahedra and finite groups: 05 Svyazhinite, 05 Aubertite
    Aubertite
    Aubertite is a mineral with the chemical formula CuAl2Cl·14. It is colored blue. Its crystals are triclinic pedial. It is transparent. It has vitreous luster. It is not radioactive. Aubertite is rated 2-3 on the Mohs Scale....
    
    , 05 Magnesioaubertite; 10 Rostite, 10 Khademite; 15 Jurbanite
    Jurbanite
    Jurbanite is a mineral with the chemical formula AlSO4·5H2O. Its molecular weight is 230.13 g/mol.-References:* *...
    
    ; 20 Minasragrite, 20 Anorthominasragrite, 20 Orthominasragrite; 25 Bobjonesite; 30 Amarantite
    Amarantite
    Amarantite is an amaranth-red to brownish mineral with the general formula of Fe3+2[O|2]·7H2O. The name comes from the Greek word αμάραντος which means amaranth, an imaginary undying red flower, in allusion to its color....
    
    , 30 Hohmannite, 30 Metahohmannite; 35 Aluminocopiapite, 35 Copiapite, 35 Calciocopiapite, 35 Cuprocopiapite, 35 Ferricopiapite, 35 Magnesiocopiapite, 35 Zincocopiapite
  • 07.DC With only medium-sized cations; chains of corner-sharing octahedra: 05 Aluminite
    Aluminite
    For the igneous rock type "websterite", see pyroxenite.Aluminite is a hydrous aluminium sulfate mineral with formula: Al2SO44·7. It is an earthy white to gray-white monoclinic mineral which almost never exhibits crystal form. It forms botryoidal to mammillary clay-like masses. It is very soft Mohs...
    
    , 05 Meta-aluminite; 10 Butlerite, 10 Parabutlerite; 15 Fibroferrite, 20 Xitieshanite; 25 Botryogen
    Botryogen
    Botryogen is a hydrous magnesium sulfate mineral with formula: MgFe3+2·7H2O. It is also known as quetenite.It crystallizes in the monoclinic prismatic system and typically occurs as vitreous bright yellow to red botryoidal to reniform masses and radiating crystal prisms...
    
    , 25 Zincobotryogen
    Zincobotryogen
    Zincobotryogen is a hydrous sulfate mineral with formula Fe3+2·7H2O. It forms bright orange red monoclinic prismatic crystals that exhibit a vitreous to greasy luster. Its specific gravity is 2.201 and it has a Mohs hardness of 2.5....
    
    ; 30 Chaidamuite
    Chaidamuite
    Chaidamuite is a sulfate mineral that was first found in Xitieshan mine south of Mt. Qilianshan in the Chaidamu basin, Qinghai Province, China. It is named from locality and is a hydrated sulfate containing a hydroxyl and four dihydrogen monoxide molecules...
    
    , 30 Guildite
  • 07.DD With only medium-sized cations; sheets of edge-sharing octahedra: 05 Basaluminite?, 05 Felsobanyaite, 07.5 Kyrgyzstanite, 08.0 Zn-Schulenbergite; 10 Langite
    Langite
    Langite is a rare hydrated copper sulfate mineral, with hydroxyl, found almost exclusively in druses of small crystals. It is formed from the oxidation of copper sulfides, and was first described in specimens from Cornwall, England. It is dimorphous with wroewolfeite...
    
    , 10 Posnjakite, 10 Wroewolfeite; 15 Spangolite, 20 Ktenasite, 25 Christelite; 30 Campigliaite
    Campigliaite
    Campigliaite is a copper and manganese sulfate mineral with a chemical formula of Cu4Mn26•4H2O. It has a chemical formula and also a crystal structure similar to niedermayrite, with Cd cation replacing by Mn. The formation of campigliaite is related to the oxidation of sulfide minerals to form...
    
    , 30 Devilline
    Devilline
    Devilline is a sulfate mineral with the chemical formula CaCu426•3H2O. The name originates from the French chemist's name, Henri Etienne Sainte-Claire Deville .Devilline crystallizes in the monoclinic system...
    
    , 30 Orthoserpierite, 30 Niedermayrite
    Niedermayrite
    Niedermayrite is a rare hydrated copper cadmium sulfate hydroxide mineral with formula: Cu4Cd26·4H2O. It crystallizes in the monoclinic system and occurs as encrustations and well formed vitreous blue-green prismatic crystals. It has a specific gravity of 3.36.Niedermayrite was named for Gerhard...
    
    , 30 Serpierite; 35 Motukoreaite, 35 Mountkeithite, 35 Glaucocerinite, 35 Honessite, 35 Hydrowoodwardite, 35 Hydrohonessite, 35 Shigaite, 35 Natroglaucocerinite, 35 Wermlandite, 35 Nikischerite, 35 Zincaluminite, 35 Woodwardite, 35 Carrboydite, 35 Zincowoodwardite, 35 Zincowoodwardite-3R, 35 Zincowoodwardite-1T; 40 Lawsonbauerite, 40 Torreyite, 45 Mooreite, 50 Namuwite, 55 Bechererite, 60 Ramsbeckite, 65 Vonbezingite, 70 Redgillite; 75 Chalcoalumite, 75 Nickelalumite*; 80 Guarinoite, 80 Theresemagnanite, 80 Schulenbergite; 85 Montetrisaite
  • 07.DE With only medium-sized cations; unclassified: 05 Mangazeite; 10 Carbonatecyanotrichite, 10 Cyanotrichite
    Cyanotrichite
    Cyanotrichite is a copper aluminium sulfate mineral, Cu4Al2[12|SO4]·2H2O, also known as lettsomite, very similar to halotrichite, and a member of the same group. However, it is much rarer. It forms velvety aggregates of extremely fine fibres and radial aggregates...
    
    ; 15 Schwertmannite
    Schwertmannite
    Schwertmannite is an iron-oxyhydroxysulfate mineral with an ideal chemical formula of 886·nH2Oor Fe3+16O1612-13·10-12H2O. It is an opaque tetragonal mineral typically occurring as brownish yellow encrustations...
    
    , 20 Tlalocite, 25 Utahite
    Utahite
    Utahite is an extremely rare secondary copper zinc tellurate mineral found as a product of oxidation. Its chemical formula is Cu5Zn348•7H2O....
    
    , 35 Coquandite, 40 Osakaite, 45 Wilcoxite, 50 Stanleyite, 55 Mcalpineite, 60 Hydrobasaluminite, 65 Zaherite
    Zaherite
    Zaherite is a mineral, a complex sulfate of aluminium, formula Al12265·20H2O. Discovered in 1977 in the Salt range, Punjab, Pakistan by Mohamed Abduz Zaher of the Bangladesh Geological Survey after whom it is named. This mineral would be extremely soluble in water and unlikely to persist anywhere...
    
    , 70 Lautenthalite, 75 Camerolaite, 80 Brumadoite
  • 07.DF With large and medium-sized cations: 05 Uklonskovite
    Uklonskovite
    Uklonskovite is a colorless monoclinic mineral found in Chile, Italy and Uzbekistan....
    
    , 10 Kainite
    Kainite
    Kainite is a mineral salt that consists of potassium chloride and magnesium sulfate and is used as a fertilizer. This mineral is dull and soft, is colored white through yellow to red and is found in the Stassfurt salt mines in Saxony, Germany...
    
    , 15 Natrochalcite; 20 Metasideronatrite, 20 Sideronatrite; 25 Despujolsite, 25 Fleischerite, 25 Schaurteite, 25 Mallestigite; 30 Slavikite, 35 Metavoltine; 40 Lannonite, 40 Vlodavetsite; 45 Peretaite, 50 Gordaite, 55 Clairite, 60 Arzrunite, 65 Elyite, 70 Yecoraite, 75 Riomarinaite, 80 Dukeite, 85 Xocolatlite
  • 07.DG With large and medium sized cations; with NO₃, CO₃, B(OH)₄, SiO₄ or IO₃: 05 Darapskite; 10 Clinoungemachite, 10 Ungemachite, 10 Humberstonite; 15 Bentorite
    Bentorite
    Bentorite is a mineral with the chemical formula Ca62312·26. It is colored violet to light violet. Its crystals are hexagonal to dihexagonal dipyramidal. It is transparent and has vitreous luster. It has perfect cleavage. It is not radioactive...
    
    , 15 Charlesite, 15 Ettringite
    Ettringite
    Ettringite is a hydrous calcium aluminium sulfate mineral with formula: Ca6Al2312·26H2O. It is a colorless to yellow mineral crystallizing in the trigonal system...
    
    , 15 Jouravskite, 15 Sturmanite, 15 Thaumasite
    Thaumasite
    -External links:*...
    
    , 15 Carraraite, 15 Buryatite; 20 Rapidcreekite, 25 Tatarskite, 30 Nakauriite, 35 Chessexite; 40 Carlosruizite, 40 Fuenzalidaite; 45 Chelyabinskite*
• 07.E Uranyl Sulfates
  • 07.EA Without cations: 05 Uranopilite
    Uranopilite
    Uranopilite is a minor ore of uranium with the chemistry 6SO46O2·12H2O or, Hydrated Uranyl Sulfate Hydroxide.As with many uranyl minerals, it is fluorescent and radioactive. It is straw yellow in normal light. Uranopilite fluoresces a bright green under ultraviolet light...
    
    , 05 Metauranopilite, 10 Jachymovite
  • 07.EB With medium-sized cations: 05 Johannite
    Johannite
    Johannite is a rare uranium sulfate mineral. It crystallizes in the triclinic crystal system with the chemical composition Cu[UO2SO4]2·8H2O. It crystallizes in the triclinic system and develops only small prism or thin to thick tabular crystals, usually occurs as flaky or spheroidal aggregates and...
    
    , 10 Deliensite
  • 07.EC With medium-sized and large cations: 05 Cobaltzippeite, 05 Magnesiozippeite, 05 Nickelzippeite, 05 Natrozippeite, 05 Zinc-zippeite, 05 Zippeite
    Zippeite
    Zippeite is a hydrous potassium uranium sulfate mineral with formula: K46310·4. It forms yellow to reddish brown monoclinic-prismatic crystals with perfect cleavage. The typical form is as encrustations and pulverulent earthy masses. It forms as efflorescent encrustations in underground uranium...
    
    ; 10 Rabejacite, 15 Marecottite, 20 Pseudojohannite
• 07.J Thiosulfates
  • 07.JA Thiosulfates with Pb: 05 Sidpietersite
• 07.X Unclassified Strunz Sulfates (Selenates, Tellurates)
  • 07.XX Unknown: 00 Aiolosite, 00 Steverustite, 00 Grandviewite, 00 IMA2009-008, 00 Adranosite, 00 Blakeite

Class: chromates

• 07.F Chromates
  • 07.FA Without additional anions: 05 Tarapacaite
    Tarapacaite
    Tarapacaite is the mineral form of Potassium chromate with the chemical formula K2CrO4. It forms bright yellow crystals and was discovered in 1878 in Tarapacá Province, Chile for which it is named. It is unlikely that this mineral would occur anywhere except in the most arid conditions as it...
    
    , 10 Chromatite, 15 Hashemite, 20 Crocoite
    Crocoite
    Crocoite is a mineral consisting of lead chromate, PbCrO4, and crystallizing in the monoclinic crystal system. It is sometimes used as a paint, being identical in composition with the artificial product chrome yellow. It was discovered at Berezovsky deposit near Ekaterinburg in the Urals in 1766;...
    
    
  • 07.FB With additional O, V, S, Cl: 05 Phoenicochroite
    Phoenicochroite
    Phoenicochroite, also known as melanochroite, is a lead chromate mineral with formula Pb2OCrO4. It forms striking orange red crystals. It was first discovered in 1839 in Beryozovskoye deposit, Urals, Russia....
    
    , 10 Santanaite, 15 Wattersite, 20 Deanesmithite, 25 Edoylerite
  • 07.FC With PO₄, AsO₄, SiO₄: 05 Vauquelinite
    Vauquelinite
    Vauquelinite is a complex mineral with the formula CuPb2CrO4PO4OH making it a combined chromate and phosphate of copper and lead. Discovered in 1818 in the Beryozovskoye deposit, Urals, Russia, it is named after Louis Vauquelin , a French chemist....
    
    ; 10 Fornacite
    Fornacite
    Fornacite is a rare lead, copper chromate arsenate hydroxide mineral with formula: Pb2Cu. The phosphate ion is also reported as substituting in the mineral. It forms variably green to yellow, translucent to transparent crystals in the monoclinic - prismatic crystal system...
    
    , 10 Molybdofornacite; 15 Hemihedrite, 15 Iranite; 20 Embreyite, 20 Cassedanneite;
  • 07.FD Dichromates: 05 Lopezite
    Lopezite
    Lopezite is a rare red chromate mineral with chemical formula: K2Cr2O7. It crystallizes in the triclinic crystal system.It occurs as rare vug fillings in nitrate ores in association with tarapacáite , dietzeite and ulexite in the Chilean Atacama and is reported from the Bushveld igneous complex of...
    
    

Class: molybdates

• 07.G Molybdates
  • 07.GA Without additional anions or H₂O: 05 Powellite
    Powellite
    Powellite is a calcium molybdate mineral with formula CaMoO4. Powellite crystallizes with tetragonal - dipyramidal crystal structure as transparent adamantine blue, greenish brown, yellow to grey typically anhedral forms. It exhibits distinct cleavage and has a brittle to conchoidal fracture. It...
    
    , 05 Wulfenite
    Wulfenite
    Wulfenite is a lead molybdate mineral with the formula PbMoO4. It can be most often found as thin tabular crystals with a bright orange-red to yellow-orange color, sometimes brown, although the color can be highly variable. In its yellow form it is sometimes called "yellow lead ore".It crystallizes...
    
    
  • 07.GB With additional anions and/or H₂O: 05 Lindgrenite, 10 Szenicsite, 30 Ferrimolybdite, 40 Obradovicite; 45 Mendozavilite, 45 Paramendozavilite
• 07.H Uranium and Uranyl Molybdates
  • 07.HA With U⁴⁺: 05 Sedovite, 10 Cousinite, 15 Moluranite
  • 07.HB With U⁶⁺: 15 Calcurmolite, 20 Tengchongite

Class: tungstates

• 07.G Wolframates and Niobates
  • 07.GA Without additional anions or H₂O: 05 Fergusonite
    Fergusonite
    Fergusonite is a mineral comprising a complex oxide of various rare earth elements. The chemical formula of fergusonite species is NbO4, where RE = rare-earth elements in solid solution with Y. Yttrium is usually dominant , but sometimes Ce or Nd may predominate in molar proportion...
    
    -(Ce)*, 05 Fergusonite-(Nd)*, 05 Fergusonite-(Y), 05 Stolzite
    Stolzite
    Stolzite is a mineral, a lead tungstate; with the formula PbWO4. It is similar to, and often associated with, wulfenite which is the same chemical formula except that the tungsten is replaced by molybdenum...
    
    , 05 Scheelite
    Scheelite
    Scheelite is a calcium tungstate mineral with the chemical formula CaWO4. It is an important ore of tungsten. Well-formed crystals are sought by collectors and are occasionally fashioned into gemstones when suitably free of flaws...
    
    ; 10 Formanite-(Y), 10 Iwashiroite-(Y); 15 Paraniite-(Y)
  • 07.GB With additional anions and/or H₂O: 15 Cuprotungstite, 20 Phyllotungstite, 25 Rankachite, 35 Anthoinite, 35 Mpororoite
• 07.H Uranium and Uranyl Wolframates
  • 07.HA With U⁴⁺: (none)
  • 07.HB With U⁶⁺: 25 Uranotungstite