Macle
Encyclopedia
Macle is a term used in crystallography
. It is a crystalline form, twin-crystal or double crystal
(such as chiastolite
).
Macle is an old French
word, a heraldic
term for a voided lozenge
(one diamond
shape within another). Etymologically word is derived from the Latin's macula meaning spot
, mesh
or hole
)
Crystallography
Crystallography is the experimental science of the arrangement of atoms in solids. The word "crystallography" derives from the Greek words crystallon = cold drop / frozen drop, with its meaning extending to all solids with some degree of transparency, and grapho = write.Before the development of...
. It is a crystalline form, twin-crystal or double crystal
Crystal
A crystal or crystalline solid is a solid material whose constituent atoms, molecules, or ions are arranged in an orderly repeating pattern extending in all three spatial dimensions. The scientific study of crystals and crystal formation is known as crystallography...
(such as chiastolite
Chiastolite
The mineral chiastolite is a variety of andalusite with the chemical composition Al2SiO5. It is noted for distinctive cross-shaped black inclusions of graphite. In areas around Georgetown, California, metamorphosed sediments contained andalusite and chiastolite in a graphite rich metasediment...
).
Macle is an old French
Old French
Old French was the Romance dialect continuum spoken in territories that span roughly the northern half of modern France and parts of modern Belgium and Switzerland from the 9th century to the 14th century...
word, a heraldic
Heraldry
Heraldry is the profession, study, or art of creating, granting, and blazoning arms and ruling on questions of rank or protocol, as exercised by an officer of arms. Heraldry comes from Anglo-Norman herald, from the Germanic compound harja-waldaz, "army commander"...
term for a voided lozenge
Lozenge
A lozenge , often referred to as a diamond, is a form of rhombus. The definition of lozenge is not strictly fixed, and it is sometimes used simply as a synonym for rhombus. Most often, though, lozenge refers to a thin rhombus—a rhombus with acute angles of 45°...
(one diamond
Diamond
In mineralogy, diamond is an allotrope of carbon, where the carbon atoms are arranged in a variation of the face-centered cubic crystal structure called a diamond lattice. Diamond is less stable than graphite, but the conversion rate from diamond to graphite is negligible at ambient conditions...
shape within another). Etymologically word is derived from the Latin's macula meaning spot
Spot
The common noun or verb spot has many meanings in English.Otherwise, Spot or SPOT may refer to:-Fiction:* Spot the Dog, a series of children's books adapted for animation* Spot , a character in 101 Dalmatians: The Series...
, mesh
Mesh
Mesh consists of semi-permeable barrier made of connected strands of metal, fiber, or other flexible/ductile material. Mesh is similar to web or net in that it has many attached or woven strands.-Types of mesh:...
or hole
Hole
A hole is an opening in a solid.Hole or holes may also refer to:* Black hole* Blind hole* Electron hole, a concept in physics and chemistry* Fox hole or spider hole, in the military...
)
See also
- Macle on the French Wikipedia about "macle" in cristallography