A reddish mineral now regarded as a variety of biotite.
单词 | θ6953 |
释义 | 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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