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naumannite

noun nau·mann·ite \ ˈnȯməˌnīt , ˈnau̇m- \
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Definition of naumannite

plural -s
: a mineral (Ag2Se) consisting of a silver selenide in iron-black cubic crystals or massive (specific gravity 8)

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Origin and Etymology of naumannite

German naumannit, from Karl F. Naumann †1873 German mineralogist + German -it -ite

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