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Biotite



Biotite is a common Silicate minerals mineral that contains potassium, magnesium, iron and aluminium. It is sometimes called "iron mica" and is found in granite rocks, gneiss, and schist. Like other mica minerals, biotite has a highly perfect basal cleavage, its flexible sheets easily flaking off. It has a Mohs scale of mineral hardness of 2.5 - 3, a specific gravity of 2.7 - 3.1, is colored green to brown or black, and can be transparent to opaque. Biotite is occasionally found in large sheets, especially in pegmatite veins, and also occurs as a contact metamorphic rock or the product of the alteration of hornblende, augite, wernerite, and similar minerals. Biotite occurs in the lava of Mount Vesuvius, at Monzoni, and many other Europe locations. In the United States, it is found in the pegmatites of New England, Virginia and North Carolina, as well as in the granite of Pikes Peak, Colorado. Biotite was named in honor of the Famous French people List of physicists Jean Baptiste Biot. == See also == *List of minerals Minerals Silicate minerals


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B

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Words begining with Biotite:

Biotite


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