Biotite - Wikipedia
WEBBiotite 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.
Biotite Mineral | Uses and Properties - Geology.com
WEBBiotite is a rock-forming mineral found in a wide range of crystalline igneous rocks such as granite, diorite, gabbro, peridotite, and pegmatite. It also forms under metamorphic conditions when argillaceous rocks are exposed to …
Biotite mica: The mineral Biotite information and pictures
WEBFlaky habit, crystals, sectility, and mode of occurence. Biotite is a common rock-forming mineral, and is especially noted in metamorphic rock s such as schist and gneiss. It is also found in igneous rock such as granite s and rhyolites. Biotite is also the primary mica in rare earth pegmatite s.
Biotite Mineral Geology and Uses - ThoughtCo
WEBJan 16, 2020 · Key Takeaways. Biotite is a dark-colored mica. It is an aluminosilicate mineral that forms sheets or flakes. Although biotite is sometimes called black mica, it occurs in other colors, including brown, greenish-brown, yellow, and even white. Biotite occurs with other types of mica, even within a single rock.
Biotite Mica : Properties, Formation, Ocurrence and Uses
WEBModified date: 02/09/2023. Biotite is the most common mica mineral and also known as black mica, a silicate mineral in the common mica group. Approximate chemical formula K (Mg, Fe). It can be found in massive crystal layers weighing several hundred pounds.
Biotite | Mica, Silicate, Rock-Forming | Britannica
WEBBiotite, 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.
Biotite – Geology is the Way
WEBBiotite, also known, as ‘black mica’ is a rock-forming femic phyllosilicate that occurs in several igneous and metamorphic rocks. The mineral was named in honor of the French scientist Jean-Baptiste Biot, who devoted his life to study the optical properties of the micas. Structure and chemistry.
Biotite Mineral Data
WEBChemical Formula: K (Mg,Fe++)3 [AlSi3O10 (OH,F)2. Composition: Molecular Weight = 433.53 gm. Potassium 9.02 % K 10.86 % K 2 O. Magnesium 14.02 % Mg 23.24 % MgO. Aluminum 6.22 % Al 11.76 % Al 2 O 3. Iron 6.44 % Fe 8.29 % FeO. Silicon 19.44 % Si 41.58 % SiO 2. Hydrogen 0.41 % H 3.64 % H 2 O. Oxygen 43.36 % O. Fluorine 1.10 % …
Biotite | Common Minerals
WEBA 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 …
Biotite - Rock-Forming Minerals - Sandatlas
WEBBiotite is present in both silica under- and oversaturated rocks. Biotite, because it is the host of relatively uncommon chemical elements in a given magma, is a very common ingredient of pegmatites which crystallize from late-magmatic fluids. Large “books” are a common sight in pegmatitic rocks.
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