biotite

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Related to biotites: Black mica

bi·o·tite

 (bī′ə-tīt′)
n.
A dark-brown or dark-green to black mica, K(Mg,Fe)3(Al,Fe)Si3O10(OH)2, found in igneous and metamorphic rocks.
[After Jean Baptiste Biot (1774-1862), French physicist.]
bi′o·tit′ic (-tĭt′ĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

biotite

(ˈbaɪəˌtaɪt)
n
(Minerals) a black or dark green mineral of the mica group, found in igneous and metamorphic rocks. Composition: hydrous magnesium iron potassium aluminium silicate. Formula: K(Mg,Fe)3(Al,Fe)Si3O10(OH)2. Crystal structure: monoclinic
biotitic adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

bi•o•tite

(ˈbaɪ əˌtaɪt)

n.
a mica occurring in black, dark brown, or dark green sheets and flakes: an important constituent of igneous and metamorphic rocks.
[1860–65; after J. B. Biot (1774–1862), French mineralogist; see -ite 1]
bi`o•tit′ic (-ˈtɪt ɪk) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

bi·o·tite

(bī′ə-tīt′)
A dark-brown to black mica found in igneous and metamorphic rocks.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.biotite - dark brown to black mica found in igneous and metamorphic rock
lepidomelane - a mica that is a biotite containing iron
isinglass, mica - any of various minerals consisting of hydrous silicates of aluminum or potassium etc. that crystallize in forms that allow perfect cleavage into very thin leaves; used as dielectrics because of their resistance to electricity
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
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References in periodicals archive ?
The conclusion about the increased alkalinity of the mineral-forming melt for the KTSZ is confirmed by studies on the composition of biotites (Nebera et al., 2012) and feldspar luminescence (Boroznovskaya et al., 2012).
LUMINESCENCE OF ROCK-FORMING QUARTZ OF THE GRANITOIDS FROM THE KOLYVAN-TOMSK FOLDED BELT IN RELATION TO FACIES FEATURES OF MASSIF FORMATION
Previous studies also indicate that the chemical composition of biotites in granites is controlled by conditions of magma cooling and crystallization; these conditions include oxygen fugacity, temperature, and pressure.
Composition of biotite within the Wushan granodiorite, Jiangxi Province, China: petrogenetic and metallogenetic implications
This mineral is mainly an inclusion of biotites since it is formed in the initial stages of crystallization.
Introduction of accessory minerals in Ghareh Gheshlagh granitoid mass
Muscovite 40Ar/39Ar ages are 17 to 14 Ma [Lee et al., 2006] and biotites are 14 to 11 Ma [King et al., 2011].
Laser-Ablation Split-Stream Petrochronology of Kangmar and Mabja North Himalayan Gneiss Domes
The rock types of the basement, according Adamu (1991), are medium to coarse grained granite, undifferentiated schist, gneisses, granite gneisses, fine grained biotites and biotites-hornblende granite, quartz monzonite, quartz diorite and granodiorites.
Delineation of the subsurface for determination of suitable borehole sites for irrigation work at Kan Kurmi, north central basement complex, Nigeria
During the hydrolysis reaction at an initial stage of weathering, it is quite likely that feldspars and biotites were dissolved to produce soluble Al in solution, which then crystallised as gibbsite on a solid mineral surface.
Lateritic soils of Kerala, India: their mineralogy, genesis, and taxonomy
A limited but detailed study of R-feldspar megacrysts from rocks related to the Monte Capanne pluton indicates marked variation in [sup.87]Sr/[sup.86]Sr ratios of included biotites compared to their K-feldspar megacryst host, and to the matrix biotite of the enclosing rock (Table 2).
When and where did hybridization occur? The case of the Monte Capanne pluton, Italy
Biotites from the Destna and the Lasenice granite have a high content of Al (Table 5, Fig.
Geochemical constraints on the origin of a distinct type of two-mica granites (Destna--Lasenice type) in the Moldanubian batholith (Czech Republic)
From China, too, an interesting paper about the petrography and mineralogy of biotites within the Wushan granodiorite is presented.
Letter from editor
The study sector of the MCT zone recorded a metamorphic event at higher PT conditions up to amphibolite facies followed by a lower grade metamorphism and deformation acquired during exhumation reaching the PT conditions of 2-4 Kbar and 300-400degC at nearly 14-17 Ma determined through Ar/Ar datings on white micas and biotites recrystallized along the mylonitic foliation pointed out a cooling age for the MCTZ (Montomoli et al., in prep.; Vannay and Hodges, 1996).
The Main Central Thrust Zone in Western Nepal
Tarzi, J.G., and Protz, R.: 1979, Increased selectivity of naturally weathered biotites for potassium, Soil Science Society of America Journal, 43, No.
Vermiculite mineralization associated with ultramafics in Agasthyapura area, Mysore dist., Karnataka state, India--a mineralogical study
Biotite is present in all studied samples in variable concentrations.
Correlation of upper Llandovery-lower Wenlock bentonites in the Nar (Gotland, Sweden) and ventspils (Latvia) drill cores: role of volcanic ash clouds and shelf sea currents in determining areal distribution of bentonite/Ulem-Llandovery-Alam-Wenlocki bentoniitide korrelatsioon Nari (Gotland, Rootsi) ja Ventspilsi (Lati) puursudamike vahel: vulkaanilise tuha pilvede ning merehoovuste roll bentoniidi levikuala tekkel

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