Aminoffite

General Information: Chemical Formula:Ca3Be2Si3O10(OH)2 Composition:(Molecular Weight = 416.52 gm)Calcium 28.87 % CaBeryllium 4.33 % BeSilicon 20.23 % SiHydrogen 0.48 % H Oxygen 46.09 % O  Empirical Formula: Ca3Be2(Si3O10)(OH)2 Environment:In fluorite veins in the Dugdinsk Massif, Tuva, Siberia, Russia. Locality:TL: Langban, Varmland, Sweden. Name Origin:Named for Gregori Aminoff (1993-1947), Swedish Mineralogist and crystallographer.Physical Properties: Cleavage:[001] Indistinct Color:colorless or light yellow. Density:2.94 Diaphaniety:Transparent Hardness:5.5 - Knife Blade Luster:Vitreous (Glassy) Streak:whiteMore details...

Ca2(Be,Al)Si2O7(OH) (H2O)