Ekanite

General Information: Chemical Formula:ThCa2Si8O20 Composition:(Molecular Weight = 856.87 gm)Calcium 9.35 % CaThorium 27.08 % ThSilicon 26.22 % SiOxygen 37.34 % O  Empirical Formula: ThCa2Si8O20 IMA Status:Approved IMA 1961Physical Properties: Cleavage:[101] Distinct Color:green, yellow, or dark red. Density:3.08 Diaphaniety:Translucent Hardness:4.5 - Between Fluorite and Apatite Luster:Vitreous (Glassy) Streak:whiteMore details...

General Information: Chemical Formula:K(La,Ce,Th)2(Ca,Na)4(Si,Al)16O40 IMA Status:Approved IMA 1976Physical Properties: Cleavage:[???] Good, [???] Good Color:greenish yellow. Density:3.27 Diaphaniety:Transparent to Translucent Hardness:4.5 - Between Fluorite and Apatite Luster:Earthy (Dull) Streak:whiteMore details...