General Information:
Chemical Formula:
(Y,Th)2Si2O7
Empirical Formula:
Y1.5HTh0.5Si2O7
Environment:
Associated with gadolinite.
IMA Status:
Approved IMA 1987
Locality:
Llano Co., Texas, USA.
Physical Properties:
Cleavage:
None
Color:
green or orangish yellow.
Density:
4.58
Habits:
Massive - Uniformly indistinguishable crystals forming large masses., ,
Hardness:
5-5.5 - Apatite-Knife Blade
Luminescence:
Non-fluorescent.
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