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euxenite

[yook-suh-nahyt] /ˈyuk səˌnaɪt/
noun
1.
a rare, brownish-black mineral of complex composition, an oxide of calcium, cerium, yttrium, columbium, titanium, and uranium.
Origin
1840-1845
1840-45; < Greek eúxen(os) kind to strangers, hospitable (see eu-, xeno-) + -ite1
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British Dictionary definitions for euxenite

euxenite

/ˈjuːksɪˌnaɪt/
noun
1.
a rare brownish-black mineral containing erbium, cerium, uranium, columbium, and yttrium
Word Origin
C19: from Greek euxenos hospitable (literally: well-disposed to strangers), from eu- + xenos stranger; from its containing a number of rare elements
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Encyclopedia Article for euxenite

complex oxide mineral, a niobate-titanate that forms hard, brilliant black crystals and masses in granite pegmatites and associated detrital deposits. Titanium replaces niobium-tantalum in the molecular structure to form the similar mineral polycrase; both it and euxenite often contain rare earths. These minerals are widespread in Norway, Madagascar, and Canada and also occur in Sweden, Finland, Greenland, Australia, Brazil, and the U.S. For chemical formula and detailed physical properties, see oxide mineral (table)

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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