General Information:
Chemical Formula:
CaFe+++3H(WO4)6·10(H2O)
Composition:
(Molecular Weight = 1,875.87 gm)
Calcium 2.14 % Ca
Iron 8.93 % Fe
Hydrogen 1.13 % H
Tungsten 58.80 % W
Oxygen 29.00 % O
Empirical Formula:
CaFe3+3H(WO4)6·10(H2O)
Environment:
Secondary tungsen mineral.
IMA Status:
Approved IMA
Locality:
Clara mine, Oberwolfach, Schwarzwald, Baden-Wurttenberg, Germay.
Name Origin:
Named for the crystal habit and compositon.
Physical Properties:
Cleavage:
[001] Perfect
Color:
yellow.
Density:
5.26
Diaphaniety:
Translucent
Habits:
Tabular - Form dimensions are thin in one direction., Scaly - Morphology like fish scales., Encrustations - Forms crust-like aggregates on matrix.
Hardness:
2 - Gypsum
Luster:
Pearly
Streak:
yellowish
More details...