Biotite is a common group of phyllosilicate minerals within the mica group, with the approximate chemical formula K(Mg,Fe) 3AlSi 3O 10(F,OH) 2.
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How rare is biotite?
A common, widespread, rock-forming mineral, biotite is a significant mineral in granites, diorites, and igneous pegmatites.
What is another name for biotite?
Biotite is also sometimes called "black mica" as opposed to "white mica" (muscovite) – both may form in the same rocks, and in some instances side by side.
Biotite
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Biotite is a common group of phyllosilicate minerals within the mica group, with the approximate chemical formula K(Mg, Fe)₃AlSi₃O₁₀(F, OH)₂. Wikipedia
Formula: K(Mg,Fe)3(AlSi3O10)(F,OH)2
Birefringence: δ = 0.03–0.07
Cleavage: Perfect on the
Color: Dark brown, greenish-brown, blackish-brown, yellow
Crystal habit: Massive to platy
Crystal system: Monoclinic
Fracture: Micaceous
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Biotite is a common phyllosilicate mineral within the mica group, with the approximate chemical formula K(Mg,Fe) 3 AlSi 3 O 10 (F,OH) 2.
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Biotite is a very common rock-forming mineral found in schists, gneises, granites and rhyolites, often in association with quartz, potassic feldspars, ...
Biotite has the right tool for you. This package bundles popular tasks in computational molecular biology into a uniform and fast Python library.
Biotite, usually dark green, brown, or black, has a pale brown color under plane-polarized light in this sample. It exhibits high interference colors in cross- ...
Named in 1847 by Johann Friedrich Ludwig Hausmann in honour of the French physicist, mathematician, meteoriticist, astronomer, and mineralogist, Jean-Baptiste ...
A common, widespread, rock-forming mineral, biotite is a significant mineral in granites, diorites, and igneous pegmatites.
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 ...
Biotite ; Type, Mineral ; Luster, Nonmetallic Shiny ; Hardness, 2.5 – 3 > Fingernail but < Glass ; Cleavage, Yes Perfect Basal Cleavage ; Streak, Dark Brown to Black.