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powellite
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Basalt sample returned by Apollo 15, from near a long sinous lunar valley called Hadley Rille. Measured at 3.3 years old.
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Astronomical Observatory of the Mojon del Trigo. Long exposure using the star trail technique. Sierra Nevada National Park, in the province of Granada, Andalusia.
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Ethel Rosenberg arrested in August 1950. Photograph dated Aug. 8, 1950. American civilians executed for espionage. Spies, communists, Julius Rosenberg
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powellite

mineral
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Also known as: calcium molybdate
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Article History

powellite, the mineral calcium molybdate, CaMoO4, ordinarily found only as a component of solid solutions in the calcium tungstate mineral scheelite (q.v.).

This article was most recently revised and updated by John P. Rafferty.