The Encylopedia of gems in English is still under construction. Thanks to visit the encyclopedia of gems in French.

< back to the encyclopaedia (379)

Montebrasite

  • Translations : Montebrasit, Montebrasita, Монтебразит, 羟磷锂铝石
  • Etymology : Montebras Mine, Montebras-en-Soumans, Boussac, Creuse, Limousin, France.
  • Discovery: 1870 by Alfred Des Cloizeaux
  • Type localityMontebras Mines, Montebras, Soumans, Creuse, Limousin, France

Pour en savoir plus sur la minéralogie de la Montebrasite, voir Mindat.org->

Gemological data

  • Chemical formula : LiAl(PO4)(OH,F
  • Hardness (Mohs) : 5.5 - 6
  • Refractive index : nα = 1.594 - 1.615 nβ = 1.608 - 1.624 nγ = 1.616 - 1.645
  • Crystal system : Triclinique
  • Group : Amblygonites
  • Mineralogical Class : Phosphates

< back to the encyclopaedia (379)