单词	uraninite
释义	uraninite /jʊˈranɪnʌɪt / noun [mass noun] A black, grey, or brown mineral which consists mainly of uranium dioxide and is the chief ore of uranium.Arsenopyrite, cassiterite, molybdenite, wolframite, uraninite, and several of the common sulfides have all been observed at various locations.... Other accessory minerals are apatite, zircon, monazite, huttonite and rare xenotime, uraninite and betafite. A comprehensive discussion of the mineralogy and occurrence of uraninite has been given by Frondel, to which the reader is strongly referred. Origin Late 19th century: from urano-2 + -ite1.
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