
1) Brownish-black mineral 2) Calcium mineral 3) Oxide mineral 4) Titanium mineral 5) Uranium mineral
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https://www.crosswordclues.com/clue/euxenite

Euxenite or euxenite-(Y) (a correct mineralogical name) is a brownish black mineral with a metallic luster. ==Chemistry== It contains calcium, niobium, tantalum, cerium, titanium, yttrium, and typically uranium and thorium, with some other metals. The chemical formula is: (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6. It is commonly partially amorphous due to radia...
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http://en.wikipedia.org/wiki/Euxenite

• (n.) A brownish black mineral with a metallic luster, found in Norway. It contains niobium, titanium, yttrium, and uranium, with some other metals.
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http://thinkexist.com/dictionary/meaning/euxenite/

complex oxide mineral, a niobate–titanate that forms hard, brilliant black crystals and masses in granite pegmatites and associated detrital ... [1 related articles]
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http://www.britannica.com/eb/a-z/e/55
Eux'e·nite noun [ Greek ... hospitable. So named because it contains a number of rare elements.]
(Min.) A brownish black mineral with a metallic luster, found in Norway. It contains niobium, titanium, yttrium, and uranium, with some other metals.
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http://www.encyclo.co.uk/webster/E/75
(Rare Earth Yttrium Niobium Tantalum Titanium Oxide) Euxenite, which is sometimes named euxenite-(Y) (the Y is for the yttrium), is a mineral that is sometimes called a `trash can mineral` . Because it will accommodate a wide variety of elements in its crystal structure, generally the elements that other minerals do no...
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https://www.encyclo.co.uk/local/23719

a rare, brownish-black mineral of complex composition, an oxide of calcium, cerium, yttrium, columbium, titanium, and uranium.
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https://www.infoplease.com/dictionary/euxenite
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