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2025-12-25

“braunite”的英文意思

单词 braunite
释义 braunite Min.|ˈbraʊnaɪt|
[Named after Mr. Braun of Gotha (Dana).]
An anhydrous oxide of manganese, a brittle dark brownish-black mineral occurring both crystallized and massive.
1839Penny Cycl. XIV. 380/2 Braunite..before the blow⁓pipe melts and effervesces slightly with borax.1869Roscoe Elem. Chem. 233 Manganese sesquioxide..occurs in nature as the mineral braunite.
“braunite”的英文意思

 

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