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franckeite

noun franck·e·ite \ ˈfräŋkəˌīt \
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Definition of franckeite

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

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Origin and Etymology of franckeite

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

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