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pinakiolite

noun pi·nak·i·o·lite \ pə̇ˈnakēəˌlīt \
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Definition of pinakiolite

plural -s
: a magnesium and manganese borate Mg3Mn3B2O10 occurring in small black tabular crystals

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Origin and Etymology of pinakiolite

German pinakiolith, from Greek pinakion small tablet (diminutive of pinak-, pinax board, tablet) + German -lith -lite

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