pyrochlore

[ pahy-ruh-klawr, -klohr ]
/ ˈpaɪ rəˌklɔr, -ˌkloʊr /

noun

a mineral, chiefly composed of niobates of the cerium metals, occurring in syenites in the form of brown crystals.

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Origin of pyrochlore

From the German word Pyrochlor, dating back to 1820–30. See pyro-, chlor-1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020