euxenite

[Gr. euxenos =kind to strangers; but used by Scheerer as if it had meant a stranger, because the mineral was and is rare.] Min.: An orthorhombic brilliant, brownish black mineral; its hardne 6.5, its specific gravity 4.60 to 4.99. Composition: Columbo-tantalic acid, 37.16 to 4966; titanic-acid, 794 to 1626; alumina, 0 to 3'12; protoxide of yttrium, 25.09 to 34:58; protoxide of uranium, 5-22 to 8:45. Found in Norway. ( Dana .)