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thorianite

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tho·ri·a·nite  (thôr--nt, thr-)
n.
A highly radioactive blackish, greenish, or yellow mineral, ThO2, isomorphous with uraninite.

[thoria + -an + -ite.]

thorianite [ˈθɔːrɪəˌnaɪt]
n
(Earth Sciences / Minerals) a rare black mineral consisting of thorium and uranium oxides. Formula: ThO2.U3O8


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has perhaps the world's largest mineable deposit of the primary thorium minerals, thorite and thorianite.
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.
 
 
 
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