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phlogopite

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phlog·o·pite  (flg-pt)
n.
A yellow to dark brown mica, K(Mg,Fe)3AlSi3O10(OH)2, used in insulation.

[Greek phlogpos, fiery-looking (phlox, phlog-, flame; see bhel-1 in Indo-European roots + ps, p-, eye, face; see okw- in Indo-European roots) + -ite.]

phlogopite [ˈflɒgəˌpaɪt]
n
(Earth Sciences / Minerals) a brownish mica consisting of a hydrous silicate of potassium, magnesium, and aluminium, occurring principally in metamorphic limestones and ultrabasic rocks. Formula: KMg3AlSi3O10(OH)2 See also mica
[from Greek phlogōpos of fiery appearance, from phlox flame + ōps eye]

phlogopite  (flg-pt)
A yellow to dark-brown mica. Phlogopite is monoclinic and is usually found in limestone. It is used in insulation. Chemical formula: K(Mg,Fe)3AlSi3O10(OH)2.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.phlogopite - a brown form of mica consisting of hydrous silicate of potassium and magnesium and aluminum
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


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A natural phlogopite mica sample is heat-treated, and the phase transformation and the shape deformation of the sample can be considered as the cause of the pearlescent appearance.
This may reflect retention of Rb in phlogopite at low percentages of melting (highest Sr rocks).
Magnetite contains inclusions of calcite, apatite, phlogopite, and pyroxenes.
 
 
 
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