Definify.com

Webster 1913 Edition

Noun.

[So called by Berzelius from the Scandinavian god

Thor

. See

(Min.)

A mineral of a brown to black color, or, as in the variety orangite, orange-yellow. It is essentially a silicate of thorium.

thorite ‎(countable and uncountable, plural thorites)

(mineralogy) A radioactive mineral, composed mostly of thorium silicate (Th Si O₄), along with silicates of uranium and the rare earths.