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Interlayer vacancy characterization of synthetic phlogopitic micas by IR spectroscopy

Bernd Wunder and Stefan Melzer
Interlayer vacancy characterization of synthetic phlogopitic micas by IR spectroscopy
European Journal of Mineralogy (December 2002) 14 (6): 1129-1138

Abstract

Phlogopitic micas of the solid solution binaries KMg (sub 3) [AlSi (sub 3) O (sub 10) ](OH) (sub 2) (phlogopite)-RbMg (sub 3) [AlSi (sub 3) O (sub 10) ](OH) (sub 2) (Rb-phlogopite), phlogopite-CsMg (sub 3) [AlSi (sub 3) O (sub 10) ](OH) (sub 2) (Cs-phlogopite) and phlogopite-BaMg (sub 3) [AlSi (sub 3) O (sub 10) ](OH) (sub 2) (kinoshitalite) have been synthesized at 700-800 degrees C and 0.2-2.0 GPa, the run products being investigated by XRD, EPMA and IR spectroscopy. All runs gave 81-100 wt.% of phlogopitic micas, with traces of quartz, sanidine and talc; celsian and cymrite occurred in the K-Ba series. The synthetic micas consist of mixtures of polytypes 1M, 2M (sub 1) and 2M (sub 2) , with 1M being the most abundant. Interlayer vacancies of < or = 0.29 pfu were determined, indicating a significant talc component. In addition to the known characteristic phlogopite OH-stretching vibrational bands, the IR spectra of the synthetic micas with incompletely filled interlayer sites show a further OH-band, centred in the range 3674-3678 cm (super -1) , the intensity of this band being correlated with the amount of vacancies.


ISSN: 0935-1221
EISSN: 1617-4011
Serial Title: European Journal of Mineralogy
Serial Volume: 14
Serial Issue: 6
Title: Interlayer vacancy characterization of synthetic phlogopitic micas by IR spectroscopy
Affiliation: GeoForschungsZentrum Potsdam, Potsdam, Federal Republic of Germany
Pages: 1129-1138
Published: 200212
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 18
Accession Number: 2003-006883
Categories: Mineralogy of silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 200302
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