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单词 braunite
释义 braun·ite
\ˈbrau̇ˌnīt\ noun
(-s)
Etymology: Councilor Braun, 19th century German treasury official + English -ite
: a brittle brownish black or steel-gray mineral that consists of manganese silicate and occurs massive and as tetragonal crystals (hardness 6-6.5, specific gravity 4.75-4.82)
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更新时间:2024/9/21 22:11:35