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单词 biotite
释义 bi·o·tite
\ˈbīəˌtīt\ noun
(-s)
Etymology: German biotit, from Jean B. Biot died 1862 French mathematician + German -it -ite
: a generally black or dark green form of mica K2(Mg,Fe,Al)6(Si,Al)8O20(OH)4 forming a constituent of crystalline rocks and being a silicate of iron, magnesium, potassium, and aluminum (hardness 2.5-3)
bi·o·tit·ic \|bīə|tid.ik\ adjective
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