Ferritungstite
General Information:
Chemical Formula:(W++++++,Fe+++2)(O,OH)6·p(H2O) p upto 1.75
Physical Properties:
Color:yellow or brownish yellow.
Density:5.2
Diaphaniety:Translucent
Luminescence:Non-fluorescent.
Streak:light yellow
More details...
(K,Ca,Na)(W,Fe)(O,OH)6 (H2O)