thorianite


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thorianite

[′thȯr·ē·ə‚nīt]
(mineralogy)
ThO2 A radioactive mineral that crystallizes in the isometric system, occurs in worn cubic crystals, is brownish black to reddish brown in color, and has resinous luster; hardness is 7 on the Mohs scale, and specific gravity is 9.7-9.8.
References in periodicals archive ?
An intense program of stripping, trenching, geology and approximately 40,000 feet of diamond drilling was completed between 1953 and 1957 resulting in the delineation of a body of fluorite, yellow mica, uraniferous thorianite, uranothorite, chondrodite and monazite within a calcareous marble.