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1. en.wikipedia.org › wiki › BiotiteBiotite - Wikipedia

   en.wikipedia.org › wiki › Biotite

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   Biotite is a common group of phyllosilicate minerals within the mica group, with the approximate chemical formula K (Mg,Fe)3AlSi3O10(F,OH)2. It is primarily a solid-solution series between the iron - endmember annite, and the magnesium -endmember phlogopite; more aluminous end-members include siderophyllite and eastonite.

   • Crystal habit: Massive to platy
   • Crystal class: Prismatic (2/m), (same H-M symbol)

   • Mohs scale hardness: 2.5–3.0
   • Crystal system: Monoclinic

2. webmineral.com › data › BiotiteBiotite Mineral Data

   webmineral.com › data › Biotite

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   Empirical Formula: KMg 2.5 Fe 2+ 0.5 AlSi 3 O 10 (OH) 1.75 F 0.25: Environment: Granitic rocks. Forms a series with phlogopite. Has several polytypes (1M, 3T, 2M1). Biotite is now a group name for phlogopite, siderophyllite and eastonite. IMA Status: Not Approved IMA 1998 - Bitote is now the group name : Locality: Common world wide. Link to ...

3. geology.com › minerals › biotiteBiotite Mineral | Uses and Properties - Geology.com

   geology.com › minerals › biotite

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   Biotite is a group of black mica minerals with a generalized chemical formula of K (Mg,Fe) 3 (AlSi 3 O 10 ) (F,OH) 2. Learn about its physical properties, diagnostic features, and commercial applications.

4. geologyscience.com › minerals › biotiteBiotite Mica : Properties, Formation, Ocurrence and Uses ...

   geologyscience.com › minerals › biotite

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   Sep 2, 2023 · Biotite is a complex silicate mineral with a chemical formula K (Mg,Fe)_3AlSi_3O_10 (OH)_2. It belongs to the mica group and has a sheet-like structure with micaceous cleavage and dark color.

   • Chemical Classification: Dark mica
   • Luster: Vitreous

   • Color: Black, dark green, dark brown
   • Streak: White to gray, flakes often produced

5. www.minerals.net › mineral › biotiteBiotite mica: The mineral Biotite information and pictures

   www.minerals.net › mineral › biotite

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   Biotite is a common form of mica with the chemical formula K (Mg,Fe2+3) (Al,Fe3+)Si3O10(OH,F)2. It has a flaky habit, is black or dark brown, and is used as an insulator. Learn more about its members, varieties, and localities.

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7. commonminerals.esci.umn.edu › minerals-f › biotiteBiotite | Common Minerals

   commonminerals.esci.umn.edu › minerals-f › biotite

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   Biotite is a dark mica mineral with the chemical formula K (Mg,Fe)3AlSi3O10 (OH)2. Learn about its color, cleavage, hardness, luster, and how it differs from phlogopite and muscovite.

8. www.britannica.com › science › biotiteBiotite | Mica, Silicate, Rock-Forming | Britannica

   www.britannica.com › science › biotite

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   Biotite, a silicate mineral in the common mica group. It is abundant in metamorphic rocks (both regional and contact), in pegmatites, and also in granites and other intrusive igneous rocks. For chemical formula and detailed physical properties, see mica (table). Biotite is regarded as a mixture.

9. People also ask

   What is the chemical composition of biotite?

   • Chemical Composition: Biotite is a complex mineral with a chemical formula primarily represented as K (Mg,Fe)_3AlSi_3O_10 (OH)_2. This composition reflects the fact that biotite contains potassium (K), magnesium (Mg), iron (Fe), aluminum (Al), silicon (Si), and oxygen (O) atoms, along with hydroxide (OH) ions.

   Biotite Mica : Properties, Formation, Ocurrence and Uses - Geology Scie…

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   How do you identify biotite?

   • Although biotite is not very resistant to weathering and transforms into clay minerals, it is sometimes found in sediments and sandstones. Thin sheets are transparent to translucent, books are opaque. Biotite is very easy to identify, and with a little experience a person will be able to recognize it on sight.

   Biotite Mineral | Uses and Properties - Geology.com

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   Is biotite a mica?

   • Biotite is a name used for a large group of black mica minerals that are commonly found in igneous and metamorphic rocks. These include annite, phlogopite, siderophyllite, fluorophlogopite, fluorannite, eastonite, and many others. These micas vary in chemical composition but are all sheet silicate minerals with very similar physical properties.

   Biotite Mineral | Uses and Properties - Geology.com

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   Is biotite a rock forming mineral?

   • A common, widespread, rock-forming mineral, biotite is a significant mineral in granites, diorites, and igneous pegmatites. In pegmatites, biotite crystals can be very large. It also occurs in schists, gneisses, and hornfels that resulted from either regional or contact metamorphism.

   Biotite | Common Minerals

   commonminerals.esci.umn.edu/minerals-f/biotite

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