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出典:Wiktionary
Braun + -ite after alderman Braun of Gotha, Thuringia, Germany.
braunite (countable かつ uncountable, 複数形 braunites)
出典:Wikipedia
出典:『Wikipedia』 (2010/12/03 10:45 UTC 版)
Braunite is a silicate mineral containing both di- and tri-valent manganese with the chemical formula: Mn2+Mn3+6[O8|SiO4]. Common impurities include iron, calcium, boron, barium, titanium, aluminium, and magnesium.
Braunite