franckeite

noun

franck·​e·​ite

ˈfräŋkəˌīt

plural -s

: a mineral consisting of a dark gray or black massive lead antimony tin sulfide (specific gravity 5.55)

Word History

Etymology

German franckeït, from Carl and Ernest Francke, 19th century German mining engineers + German -it -ite

First Known Use

1893, in the meaning defined above

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