biotite

[n] - dark brown to black mica found in igneous and metamorphic rock
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Biotite

Bi'o┬Ětite noun [ From Biot , a French naturalist.] (Min.) Mica containing iron and magnesia, generally of a black or dark green color; -- a common constituent of crystalline rocks. See Mica .
Found on http://www.encyclo.co.uk/webster/B/54

biotite

noun dark brown to black mica found in igneous and metamorphic rock
Found on http://wordnetweb.princeton.edu/perl/webwn?s=biotite

Biotite

• (n.) Mica containing iron and magnesia, generally of a black or dark green color; -- a common constituent of crystalline rocks. See Mica.
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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 ... [8 related articles]
Found on http://www.britannica.com/eb/a-z/b/67

biotite

biotite (bī'utīt") , iron-rich variety of phlogopite, most abdunant of the mica minerals.
Found on http://www.infoplease.com/ce6/sci/A0807633.html

Biotite

Biotite, named after the naturalist Biot, is a widely distributed rock forming mineral and occurs in igneous and metamorphic rocks and is a common member of the mica group. It has the formulae K(Mg,Fe) 2(Al,Fe)Si3O10(OH, F) 2 and a relative hardness of 3.
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Biotite

A platy magnesium-iron mica, common in igneous rocks.
Found on http://www.adrianaresources.com/s/Glossary.asp

Biotite

Biotite is a common phyllosilicate mineral within the mica group, with the approximate chemical formula {chem|K(Mg,Fe)|3|AlSi|3|O|10|(F,OH)|2}. More generally, it refers to the dark mica series, primarily a solid-solution series between the iron-endmember annite, and the magnesium-endmember phlogopite; more aluminous endmembers include siderophyll...
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Biotite

A black, brown, or dark-green mica, a magnesium iron silicate.
Found on http://www.selectstone.com/architectural-resources/stone-glossary/

Biotite

A dark, iron and magnesium-rich mica found in granite.
Found on http://www.encyclo.co.uk/local/22192

Biotite

Black mica. An important rock-forming ferromagnesian silicate with silicon-oxygen tetrahedra arranged in sheets.
Found on http://www.evcforum.net/WebPages/Glossary_Geology.html

Biotite

A platy magnesium-iron mica, common in igneous rocks.
Found on http://www.adrianaresources.com/s/Glossary.asp

Biotite

A platy magnesium-iron mica, common in igneous rocks.
Found on http://www.libertystaruranium.com/miningexplained/mining-geology-glossary/

Biotite

A dark brown to green, magnesium-iron mica commonly found in igneous and metamorphic rocks.
Found on http://www.australian-shares.com/glossary-of-terms.php.html

biotite

A dark-colored phyllosilicate mineral within the mica group, with the approximate chemical formula K(Mg,Fe)3AlSi3O10(F,OH)2.
Found on http://www.scientificpsychic.com/etc/geology-glossary.html
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