Chemical Formula: LiAl(PO4)(OH)
Locality: Montebras, Creuse, France.
Name Origin: Named for the locality in 1872.
History
Discovery date: 1871
Town of Origin : MONTEBRAS, SOUMANS, CREUSE
Country of Origin : FRANCE
Optical properties
Optical and misc. Properties : Transparent to Translucent
Refractive Index: from 1,57 to 1,62
Axial angle 2V: 81°30′
Physical Properties
Cleavage: {100} Perfect, {110} Good, {011} Distinct
Color: Bluish, Colorless, Greenish, Greenish gray, Gray white.
Density: 3.027
Diaphaneity: Transparent to Translucent
Fracture: Brittle – Conchoidal – Very brittle fracture producing small, conchoidal fragments.
Hardness: 5.5-6 – Knife Blade-Orthoclase
Luster: Vitreous – Greasy
Streak: white
Photos :
(OH) Locality: Montebras, Creuse, France. Name Origin: Named for the locality in 1872. History Discovery date: 1871){kind=link}