pennantite

noun pen·nant·ite \ ˈpenənt‧ˌīt \

Definition of pennantite

plural -s
:a mineral Mn9Al6Si5O20(OH)16 of the chlorite group consisting of basic silicate of manganese and aluminum isomorphous with thuringite

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Origin and Etymology of pennantite

Thomas Pennant †1798 Welsh naturalist + English -ite


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