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 Definitions for biotite: The Collaborative International Dictionary of English v.0.48
:
Mica \Mi"ca\, n. [L. mica crumb, grain, particle; cf. F. mica.]
(Min.)
The name of a group of minerals characterized by highly
perfect cleavage, so that they readily separate into very
thin leaves, more or less elastic. They differ widely in
composition, and vary in color from pale brown or yellow to
green or black. The transparent forms are used in lanterns,
the doors of stoves, etc., being popularly called
isinglass. Formerly called also {cat-silver}, and
glimmer.
[1913 Webster]
Note: The important species of the mica group are:
muscovite, common or potash mica, pale brown or
green, often silvery, including damourite (also
called hydromica and muscovy glass); biotite,
iron-magnesia mica, dark brown, green, or black;
lepidomelane, iron, mica, black; phlogopite,
magnesia mica, colorless, yellow, brown; lepidolite,
lithia mica, rose-red, lilac.
[1913 Webster] Mica (usually muscovite, also biotite)
is an essential constituent of granite, gneiss, and
mica slate; biotite is common in many eruptive rocks;
phlogopite in crystalline limestone and serpentine.
[1913 Webster]
Mica diorite (Min.), an eruptive rock allied to diorite but
containing mica (biotite) instead of hornblende.
Mica powder, a kind of dynamite containing fine scales of
mica.
Mica schist, Mica slate (Geol.), a schistose rock,
consisting of mica and quartz with, usually, some
feldspar.
[1913 Webster]
The Collaborative International Dictionary of English v.0.48
:
Biotite \Bi"o*tite\, n. [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.
[1913 Webster]
WordNet (r) 2.0
:
biotite
n : dark brown to black mica found in igneous and metamorphic
rock
Related SitesBiotite - Wikipedia, the free encyclopedia
Biotite is found in a wide variety of igneous and metamorphic rocks. For instance, biotite occurs in the lava of Mount Vesuvius and in the Monzoni ...
Biotite
In general, keys to identifying biotite are its color and pleochrism, cleavage, ... Biotite's features generally make identification unambiguous. ...
Biotite Mineral Data
Biotite is now a group name for phlogopite, ... View Additional jPOWD Structure files for Biotite ... Optical Properties of Biotite. Gladstone-Dale: ...
biotite: Definition from Answers.com
biotite ( ) n. A dark-brown or dark-green to black mica, K(Mg,Fe) 3 (Al,Fe)Si 3 O 10 (OH) 2 , found in igneous and metamorphic rocks
BIOTITE (Potassium Iron Magnesium Aluminum Silicate Hydroxide Fluoride)
THE MINERAL BIOTITE ... Biotite is a common rock forming mineral, being present in at least some ... Biotite, like other micas, has a layered structure of iron ...
Biotite
Biotite is a mineral in the group called Mica. ... Biotite has radioactive elements in it that are used to figure out how old the mineral is. ...
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