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Dictionary


tho•ri•a•nite



Pronunciation: (thôr'ē-u-nīt", thōr'-), [key]
n.
a rare mineral, mainly thoria, ThO2, but also containing uranium, cerium, and other rare-earth metals, occurring in small, black, cubic crystals: notable for its radioactivity and used as a minor source of thorium.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

thoriathorite

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