Tengerite-(Y)

General Information: Chemical Formula:Y2(CO3)3·2-3H2O Composition:(Molecular Weight = 402.88 gm)Yttrium 44.14 % Y Hydrogen 1.25 % H Carbon 8.94 % C Oxygen 45.67 % O  Empirical Formula: Y2(CO3)3·2.5(H2O) Environment:Alteration product of gadolinite. IMA Status:Approved IMA 1987 Locality:Ytterby, northeast of Stockholm, Sweden.Physical Properties: Color:white. Density:3.12 Diaphaniety:Transparent to translucent Habits:Fibrous - Crystals made up of fibers., Pulverulent - Forms a loose, poorly-coherent powdery mass., Luminescence:Non-fluorescent. Luster:Vitreous - Dull Streak:whiteMore details...