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biotite

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biotite

Dark mica, K(Mg, Fe)3Al Si3O10(OH, F)2, a common silicate mineral. It is brown to black with shiny surfaces, and like all micas, it splits into very thin flakes along its one perfect cleavage. Biotite is a mineral found in igneous rocks, such as granites, and metamorphic rocks such as schists and gneisses.



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? Mentioned in ? References in periodicals archive
 
The metamorphosed alteration zones are characterized by the presence of various combinations of anthophyllite, cordierite, garnet, staurolite, biotite and/ or andalusite.
Government geoscience stimulates mineral exploration in the superior ... by Simard, Martin / Geoscience Canada
A poor correlation between the concentration of Fe and As in groundwater from Semaria may be caused by the presence of dissolved Fe in groundwater, which may be partly derived from the weathering of biotite, and by the variable Fe:As ratio in dissolved FeOOH (McArthur et al.
Risk of arsenic contamination in groundwater affecting the Ganga ... by Shah, Babar Ali / Environmental Health Perspectives
The sedimentary rocks have been metamorphosed to biotite hornfels around the contact of the intrusive.
Piedmont Announces First Drill Program Completed At Dutch Flat, Nevada by Business Wire
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