General Information:
Chemical Formula:
ThCa2Si8O20
Composition:
(Molecular Weight = 856.87 gm)
Calcium 9.35 % Ca
Thorium 27.08 % Th
Silicon 26.22 % Si
Oxygen 37.34 % O
Empirical Formula:
ThCa2Si8O20
IMA Status:
Approved IMA 1961
Physical 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:
white
More details...