thorianite


Also found in: Dictionary, Wikipedia.

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 ?
It must be noted that the Idaho and Montana deposits are of high-grade thorite and thorianite rather than low-grade disseminated deposits as in India, for example.
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.
5-cm thorianite crystal, a "reinite" (ferberite pseudomorph after scheelite) from Uganda, and a razor-sharp dodecahedral betafite of about 2 cm.
Melanocerite, ortholavenite, loparite, thorite, thorianite, eudialyte, perrierite, chevkinite, zircon, leucophanite, catapleiite, astrophyllite, tainiolite, calcium-rich seidozerite are found in nepheline-albite phenites at the exocontact.
Thorianite has been identified from the Namivo-Tomeia-Nampoca group of pegmatites (DSGM, 1974).