Cadmoselite
Encyclopedia
Cadmoselite is a rare cadmium selenide
mineral with chemical formula
CdSe. Cadmoselite crystallizes in the hexagonal system and occurs as black to pale grey opaque crystals and grains.
It was first described in 1957 for an occurrence in Tuva
. The mineral occurs as interstitial grains in sandstone
formed under reducing
alkaline diagenetic
conditions.
Cadmium selenide
Cadmium selenide is a solid, binary compound of cadmium and selenium. Common names for this compound are cadmium selenide, cadmium selenide, and cadmoselite ....
mineral with chemical formula
Chemical formula
A chemical formula or molecular formula is a way of expressing information about the atoms that constitute a particular chemical compound....
CdSe. Cadmoselite crystallizes in the hexagonal system and occurs as black to pale grey opaque crystals and grains.
It was first described in 1957 for an occurrence in Tuva
Tuva
The Tyva Republic , or Tuva , is a federal subject of Russia . It lies in the geographical center of Asia, in southern Siberia. The republic borders with the Altai Republic, the Republic of Khakassia, Krasnoyarsk Krai, Irkutsk Oblast, and the Republic of Buryatia in Russia and with Mongolia to the...
. The mineral occurs as interstitial grains in sandstone
Sandstone
Sandstone is a sedimentary rock composed mainly of sand-sized minerals or rock grains.Most sandstone is composed of quartz and/or feldspar because these are the most common minerals in the Earth's crust. Like sand, sandstone may be any colour, but the most common colours are tan, brown, yellow,...
formed under reducing
Redox
Redox reactions describe all chemical reactions in which atoms have their oxidation state changed....
alkaline diagenetic
Diagenesis
In geology and oceanography, diagenesis is any chemical, physical, or biological change undergone by a sediment after its initial deposition and during and after its lithification, exclusive of surface alteration and metamorphism. These changes happen at relatively low temperatures and pressures...
conditions.