coronadite
noun
cor·o·na·dite
ˌkȯrəˈnäˌdīt
plural -s
: 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
Word History
Etymology
Francisco Vásquez Coronado †1554 Spanish explorer + English -ite; from its occurrence in the Coronado vein, Greenlee county, southeast Arizona