Biotite - Wikipedia
网页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.
Biotite Mineral | Uses and Properties - Geology.com
网页Biotite 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 heat and pressure to …
Biotite Mica : Properties, Formation, Ocurrence and Uses
网页2023年9月2日 · 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: The mineral Biotite information and pictures
网页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 - Geology is the Way
网页Biotite, 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.
Biotite | Common Minerals
网页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 …
Biotite | Mica, Silicate, Rock-Forming | Britannica
网页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.
Biotite Mineral Geology and Uses - ThoughtCo
网页2020年1月16日 · Biotite is characterized by its dark color and approximate chemical formula K (Mg,Fe) 3 AlSi 3 O 10 (F,OH) 2. Cite this Article. Learn about the properties and uses of biotite, a mineral that's found in rocks and frequently used in everyday life.
What is Biotite? - Earth.com
网页Biotite is a common phyllosilicate mineral that contains potassium, magnesium, iron and aluminium. It is sometimes called “iron mica” and is found in granitic rocks, gneisses, and schists. Like other mica minerals, biotite has a highly perfect basal cleavage, its flexible sheets easily flaking off.
Biotite - Encyclopedia.com
网页2018年5月8日 · *biotite* An important rock-forming silicate mineral [1]; a member of the mica [2] group K2(Mg,Fe)6[Si3AlO10]2(OH,F)4, in which the Mg/Fe ratio is less than 2:1; biotite forms a series with phlogopite [3] (of similar composition, but with Mg/Fe greater than 2:1) and may have Fe3+, Ti4+, and Al3+