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WULFENITE

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Originally appearing in Volume V28, Page 855 of the 1911 Encyclopedia Britannica.
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WULFENITE , a See also:

mineral consisting of See also:lead molybdate, PbMoO4, crystallizing in the See also:hemimorphic-See also:tetartohedral class of the tetragonal See also:system. Crystals usually have the See also:form of thin square plates bevelled at the edges by pyramidal planes. They have a brilliant resinous to adamantine lustre, and vary in See also:colour from greyish to See also:bright yellow or red: the hardness is 3, and the specific gravity 6.7. Small amounts of See also:calcium are sometimes See also:present isomorphously replacing lead. The mineral occurs in See also:veins of lead ore, and was first found in the 18th See also:century in the lead mines at Bleiberg in See also:Carinthia. Bright yellow crystals are found in New See also:Mexico and See also:Utah, and brilliant red crystals in See also:Arizona.

End of Article: WULFENITE

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