Biotite Mineral | Uses and Properties - Geology.com
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 form schist and gneiss .
Biotite - Wikipedia
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 | Common Minerals
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 Mica : Properties, Formation, Ocurrence and Uses
Sep 2, 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: The mineral Biotite information and pictures
Biotite is a common rock-forming mineral, and is especially noted in metamorphic rocks 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
Jan 16, 2020 · 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.
Biotite - Rock-Forming Minerals - Sandatlas
Biotite is a very common and widespread mineral group. The minerals of the group occur often in metamorphic and igneous rocks. It is much less common in sediments and sedimentary rocks because it yields to clay minerals in the weathering environment. Biotite is one of the two most common members of the mica group. The other one is muscovite.
Biotite - (Mineralogy) - Vocab, Definition, Explanations - Fiveable
Biotite is a crucial component of many igneous rocks, particularly granites, as it contributes to their mineralogical composition. Its presence affects the rock's overall characteristics such as density and weathering behavior due to the potassium, magnesium, iron, …
Biotite - Geology is the Way
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 | Mica, Silicate, Rock-Forming | Britannica
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).