Biotite - Wikipedia
Biotite is a common group of phyllosilicate minerals within the mica group, with the approximate chemical formula K(Mg,Fe) 3 AlSi 3 O 10 (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 was regarded as a …
Biotite Mineral | Uses and Properties - Geology.com
The name "biotite" is used in the field and in entry-level geology courses because these minerals generally cannot be distinguished without optical, chemical, or x-ray analysis.. 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 …
黑云母 - 维基百科，自由的百科全书
黑云母（英語： Biotite ）是硅酸盐矿物 云母类矿物中的一個亞群，為金雲母和鐵雲母之間的固溶體以及鐵葉雲母和富鎂黑雲母之間的固溶體。 在過去黑雲母一直被國際礦物學協會視為獨立的礦物種類，直到1998年才視為一個礦物群。 另外黑雲母仍用於描述野外未經過分析的暗色雲母類礦物。
Biotite mica: The mineral Biotite information and pictures
Biotite is found in abundance worldwide, but collectors specimens are not common and come from few localities. Noteworthy localities include Mabubas, Bengo Province, Angola; Mendig, Eifel Mts, Germany; and Serra da Freita, Arouca, Portugal, where it comes in rounded nodules. In Canada huge "books" and well formed "barrels" come from Bancroft, Hastings Co, Ontario and from Cardiff and ...
Properties, Formation, Ocurrence and Uses - Geology Science
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 Mineral Data
General Biotite Information : Chemical 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
Biotite Mineral Geology and Uses - ThoughtCo
2020年1月16日 · Biotite is a mineral found in many rocks, but you may not recognize its name because it's often lumped together with other related minerals under the name "mica."Mica is a group of phyllosilicates or sheet silicates characterized by forming parallel sheets of silicate tetrahedrons composed of silicon oxide, Si 2 O 5.Various forms of mica have different chemical compositions and some unique ...
Biotite Group – WGNHS – UW–Madison
Biotite refers to a group of common rock-forming minerals forming a series between phlogopite and annite. The name is best used as a field name for dark micas for which the exact composition has not been determined. It is found in a variety of occurrences. It occurs in plutonic igneous rocks ranging from granites to gabbronorite to syenites. Large crystals may form in pegmatites. It …
Biotite - Geology is the Way
Biotite Monoclinic K2(Mg,Fe2+)6-4(Fe3+,Al,Ti)0-2[Si6-5Al2-3O20](OH,F)4Biotite, 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 | 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). Biotite is …