from The Century Dictionary.
- noun A native oxid of manganese, containing also 20 per cent. of manganese silicate.
- noun It occurs in tetragonal crystals of a brownish-black color in Thuringia, the Harz, Piedmont, and elsewhere.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Min.) A native oxide of manganese, of dark brownish black color. It was named from a Mr. Braun of Gotha.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun mineralogy A silicate mineral containing
divalentand trivalent manganeseand forming grey-black tetragonal crystals.
from Wiktionary, Creative Commons Attribution/Share-Alike License
Braun + -ite after alderman Braun of Gotha, Thuringia, Germany.
The sesquioxide is found crystallized in an anhydrous form in braunite, and hydrated in manganite.