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.
More details...
