bra unite


an ore of manganese, 3Mn 2 O 3 ⋅MnSiO 3 .

1830–40; named after A. E. Braun (1809–56), German official; see -ite1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
braunite (ˈbraʊnaɪt)
a brown or black mineral that consists of manganese oxide and silicate and is a source of manganese. Formula: 3Mn2O3.MnSiO3
[C19: named after A. E. Braun (1809--56), German official in the treasury at Gotha]

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