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单词 θ6953
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the world > the earth > minerals > types of mineral > silicates > phyllosilicate > [noun] > mica > biotite > varieties (5)
rubellan1832

A reddish mineral now regarded as a variety of biotite.

haughtonite1878

A variety of biotite, n., in which iron replaces much of the magnesium.

hydrobiotite1881

(a) a hydrated variety of biotite; (b) any clay composed of an intimate mixture of biotite and vermiculite.

siderophyllite1881

a dark green to black iron-rich mineral of the mica group occurring typically in pegmatites.

caswellite1894

A micaceous aluminosilicate of manganese of a copper-red colour, probably an altered form of biotite.

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更新时间:2024/9/20 18:34:29