langbanite

noun

lang·​ban·​ite

ˈlȯŋbəˌnīt

plural -s

: a hexagonal mineral (Mn,Sb,Ca,Fe,Mg)O₈(SiO₄)(?) occurring in iron-black prismatic crystals consisting of a manganese, iron, and antimony silicate and oxide (hardness 6.5; specific gravity 4.92)

Word History

Etymology

Swedish långbanit, from Långban, Värmland, Sweden, its locality + Swedish -it -ite

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