pyrochlore

noun

py·​ro·​chlore

ˈpīrəˌklō(ə)r

plural -s

: a brown or dark reddish mineral NaCaCb₂O₆F that is isomorphous with microlite and is an oxide and fluoride of sodium, calcium, and columbium

Word History

Etymology

German pyrochlor, from pyr- + Greek chlōros greenish yellow

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