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THE MINERAL BIOTITE ... Biotite is a common rock forming mineral, being present in at least some percentage in most igneous and both regional and contact metamorphic rocks. The typical black to brown color of biotite is characteristic although it is difficult to distinguish brown biotite from dark brown phlogopite.
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www.galleries.com/minerals/silicate/biotite/biotite.htm
www.galleries.com/minerals/silicate/biotite/biotite.htm
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Granitic rocks. Forms a series with phlogopite. Has several polytypes (1M, 3T, 2M1). Biotite is now a group name for phlogopite, siderophyllite and eastonite.
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webmineral.com/data/Biotite.shtml
webmineral.com/data/Biotite.shtml
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Mica Group . Biotite-Phlogopite Series . The micas on the biotite end of the series, including Annite , Fluorannite , Tetra-ferri-annite , Siderophyllite . The CNMMN Subcommittee on Nomenclature of the Micas (1998, 1999) has recommended that the name biotite be used for a series including Phlogopite , ... Parry, W.T.
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www.mindat.org/min-677.html
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Biotite is a common rock-forming silicate mineral. It is a mica found in many types of igneous rocks and in some metamorphic rocks. It is easily recognized because of its perfect cleavage that allows it to separate into thin, black, flexibl...
http://geology.com/minerals/biotite.shtml
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Definition of biotite from Webster's New World College Dictionary. Meaning of biotite. Pronunciation of biotite. Definition of the word biotite. Origin of the word biotite. ... Dictionary Home » Webster's New World College Dictionary » biotite...
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www.yourdictionary.com/biotite
www.yourdictionary.com/biotite
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Biotite mica is classified as a rock-forming mineral. ... Biotite is black mica, an iron-rich (mafic) silicate mineral that splits in thin sheets like its cousin muscovite. Learn more about biotite in the Mica Gallery.
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geology.about.com/od/minerals/ig/minpicrockforming/minp...
geology.about.com/od/minerals/ig/minpicrockforming/minpicbiotite.htm
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A large "book" of cleavable biotite from Bancroft, Ontario, Canada. ... More Biotite from the Bancroft area. ... Biotite cleavage fragments...
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www.gc.maricopa.edu/earthsci/imagearchive/biotite.htm
www.gc.maricopa.edu/earthsci/imagearchive/biotite.htm
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The mineral I will be talking about is biotite ... ; Biotite is a form of Mica and is common in Metamorphic Rocks, such as: Gness and Shist, and as well intrusive rocks such as Granite. ... On the Mohs scale Biotite can be from 2.5 to three in hardness. It is also opaque to translucent. Biotites Specific gravity is 2.7...
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www.k12.nf.ca/sjis/rocks/igneous/biotite.htm
www.k12.nf.ca/sjis/rocks/igneous/biotite.htm
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Biotite is a very common mineral. In igneous rocks it is characteristic of silicic and alkalic rocks such as granite, granodiorite, quartz diotite, pegmatite, syenite, nepheline syenite, rhyolite, rhyodacite, dacite, and phonolite.
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geology.csupomona.edu/alert/mineral/biotite.htm
geology.csupomona.edu/alert/mineral/biotite.htm
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