Hingganite-(Ce)

General Information: Chemical Formula:(Ce,Y)2([ ],Fe++)Be2Si2O8(OH,O)2 Composition:(Molecular Weight = 518.75 gm)Cerium 40.51 % CeYttrium 8.57 % Y Beryllium 3.47 % BeIron 5.38 % FeSilicon 10.83 % SiHydrogen 0.39 % H Oxygen 30.84 % O  Empirical Formula: Ce1.5Y0.5Fe2+0.5Be2Si2O8(OH)2 Environment:Occurs in pegmatite. IMA Status:Approved IMA Locality:Iwaguro Sekizai quarry, Tahara area, Hirukawa, Ena, Gifu Prefecture, Japan. Name Origin:Named for it's relationship to hingganite-(Y).Physical Properties: Color:reddish brown. Density:4.66 Diaphaniety:Transparent to Translucent Hardness:6-7 - Orthoclase-Quartz Luster:Vitreous (Glassy) Streak:whiteMore details...