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