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:
white
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