General Information:
Chemical Formula:
WO3·(H2O)
Composition:
(Molecular Weight = 249.86 gm)
Hydrogen 0.81 % H
Tungsten 73.58 % W
Oxygen 25.61 % O
Empirical Formula:
WO3·(H2O)
Environment:
Secondary mineral derived from the alteration of tungsten minerals.
Locality:
Trubull, Connecticut.
Name Origin:
Named after its composition containig tungsen (Swedish, tung sten = "heavy stone").
Physical Properties:
Cleavage:
[001] Perfect, [???] Distinct
Color:
yellow, yellow green, yellow green, or light yellow.
Density:
5.5
Diaphaniety:
Translucent to subtranslucent
Habits:
Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite)., Pulverulent - Forms a loose, poorly-coherent powdery mass.,
Hardness:
2.5 - Finger Nail
Luminescence:
None.
Luster:
Earthy (Dull)
Streak:
yellow
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