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 …

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 …

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. …

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 …

Biotite, the more abundant of the two minerals, is the iron-rich end member of the series while phlogopite is the magnesium-rich end member. A common, widespread, rock-forming mineral, …

5 days ago · Biotite is a black mica mineral found in many rocks. Discover its key traits, varieties and role in igneous and metamorphic rocks.

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 …

Jun 9, 2025 · Biotite is a dark-colored mineral found in many rocks and is also known as black mica. Biotite is used to date rocks using argon-argon or potassium-argon dating methods. …

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 …

Biotite–K (Mg,Fe)3AlSi3O10 (OH)2–is a dark, iron-rich mica that has a monoclinic crystal system. The octahedral layer is entirely occupied by Mg2+ and Fe2+ and the mineral is therefore …