ˈyüksəˌnīt noun
( -s )
Etymology: German euxenit, from Greek euxenos hospitable (from eu- + xenos guest, stranger) + German -it -ite; from the rare elements it contains
: a brownish black mineral (Y, Ca, Ce, U, Th) (Cb, Ta, Ti) 2 O 6 that consists of oxide of calcium, cerium, columbium, tantalum, titanium, and uranium, that has a metallic luster, and that is isomorphous with polycrase (hardness 6.5, specific gravity 4.7-5.0)