Tungstite

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Bright yellow tungstite on ferberite
Bright yellow tungstite on ferberite

Tungstite is a hydrous tungsten oxide mineral with formula: WO3·H2O. It is a secondary mineral formed by the weathering of other tungsten containing minerals. It crystallizes in the orthorhombic system in translucent yellow to yellow green masses. It is clay-like with Mohs hardness of 2.5 and a specific gravity of 5.5.

It was first described in 1868 for an occurrence near Trumbull, Connecticut.

[edit] References

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Tungsten minerals
Elsmoreite · Ferberite · Hübnerite · Russellite · Scheelite · Stolzite · Tungstite · Wolframite


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