biotite


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Related to biotite: biotite schist

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.

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

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.

bi·o·tite

(bī′ə-tīt′)
A dark-brown to black mica found in igneous and metamorphic rocks.
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
References in periodicals archive ?
The west-northwest trending belt includes rocks of the Kambui supergroup and is surrounded by gneiss granites of the early proterozoic period in the north and the biotite granite gneisses in the south.
K-feldspar and hydrothermal biotite forming potassic zones in both diorite and quartz monzodiorite, commonly accompanied by quartz veining, intense pervasive epidote alteration, and widespread sericite
Numerous large (4-5 mm) hornblende crystals and 3 mm long flakes of brown biotite are aligned with each other, which indicates deformation along with magmatic crystallization.
Specifically, they are located within the Scrag Lake biotite monzogranite pluton in which quartz, K-feldspar, plagioclase, and biotite are the major mineral constituents (MacDonald 2001).
The mineral composition of wastes of wet magnetic separation is substantially different from traditionally used in the manufacturing of building materials natural quartz sand and consists mostly of olivine, dolomite, calcite, and biotite (Table 1).
It recorded the basement rocks, from 98m, as intensely altered and brecciated with a matrix of biotite, chlorite, haematite and pyrite, considered to be proximal indicators of IOCG-style alteration.
Petrographic studies of the rocks revealed a plethora of minerals including biotite, hornblende, quartz, muscovite, microcline and plagioclase feldspar and some accessory minerals, Figure 2.
Wide zones of low grade gold (Au) and silver (Ag) mineralization, accompanied by widespread propylitic alteration, biotite hornfels and silicification were intersected in a number of drillholes at spatially separate targets including Mabel Jenny, Mabel Jenny North and the Prince of Wales (Table 1).
Similarly, our lab previous study reported a kind of a commercially mineral additive named Biotite V (61.
Its sheer size, rich colour and fine protective biotite shell make it difficult to see deep into the gem.
A flake of biotite (arrow) near the tree's roots provided nourishment and was the only source of potassium in the soil, Bonneville says.
125 3 Normalized Percentages of Non-opaque Minerals alumino- biotite garnet epidote silicate MPH 3.