cor·o·na·dite
| \ ˌkȯrəˈnäˌdīt \
plural -s
Definition of coronadite
: a lead and manganese oxide MnPbMn6O14 that is an important constituent of manganese ore, occurs in black massive form with fibrous structure and is isostructural with hollandite
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Merriam-Webster unabridged
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