General Information:
Chemical Formula:
Ca(Ta,Nb)2O6
Composition:
(Molecular Weight = 453.95 gm)
Calcium 8.83 % Ca
Tantalum 59.79 % Ta
Niobium 10.23 % Nb
Oxygen 21.15 % O
Empirical Formula:
CaTa1.5Nb0.5O6
Environment:
Granitic pegmatites.
IMA Status:
Approved IMA 1978
Locality:
San Diego mine, Mesa Grande, San Diego Co., California.
Physical Properties:
Cleavage:
None
Color:
beige white or pink.
Density:
6.402
Diaphaniety:
Opaque
Hardness:
4.5 - Between Fluorite and Apatite
Luster:
Sub Metallic
Streak:
white
More details...