General Information:
Chemical Formula:
(Zn,Fe++)WO4
Composition:
(Molecular Weight = 310.85 gm)
Zinc 15.78 % Zn
Iron 4.49 % Fe
Tungsten 59.14 % W
Oxygen 20.59 % O
Empirical Formula:
Zn0.75Fe2+0.25(WO4)
Physical Properties:
Cleavage:
[010] Perfect
Color:
brownish black or dark brown.
Density:
6.7
Diaphaniety:
Transparent to Opaque
Hardness:
4-4.5 - Between Fluorite and Apatite
Luster:
Resinous
Streak:
red brown
More details...