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GEOREF RECORD

Optical absorption spectra of Mn (super 3+) ions in vesuvianites from Lower Silesia, Poland

Alexej N. Platonov, Witold Zabinski and Michal Sachanbinski
Optical absorption spectra of Mn (super 3+) ions in vesuvianites from Lower Silesia, Poland
European Journal of Mineralogy (December 1995) 7 (6): 1345-1352

Abstract

Lilac, yellow and pink crystals of Mn-bearing (up to 1.10 wt.%) vesuvianites from the Jordanow rodingitic rocks in Lower Silesia were studied by optical and IR methods. Absorption spectra of the lilac samples show an intense broad band at 18500 cm (super -1) in the E ^ c polarization and weak bands at 23100, 18500 and 12500 cm (super -1) in the E c polarization. The spectra of the yellow vesuvianites have a strong E ^ c polarized band near 23600 cm (super -1) and weak bands at 23900, 22700 and 20100 cm (super -1) in the E c polarization. The spectra of the pink variety results from superposition of Mn (super 3+) bands in the spectra of the lilac and yellow vesuvianites. The spectra of the yellow vesuvianite are due to Mn (super 3+) ions occupying the five-fold-coordinated B sites; the dominant absorption band at 23600 cm (super -1) is assigned to the only symmetry-allowed transition (super 5) B (sub 1) ->> (super 5) E in Mn (super 3+) ions. The spectra of the lilac variety can be assigned to Mn (super 3+) ions in the distorted AlFe octahedra or also in B sites, which have different B-O (sub 10) distances. The distribution of Mn (super 3+) in non-equivalent structural sites of these vesuvianites may be the result of different T of crystallization and state of ordering; this is supported by IR studies.


ISSN: 0935-1221
Serial Title: European Journal of Mineralogy
Serial Volume: 7
Serial Issue: 6
Title: Optical absorption spectra of Mn (super 3+) ions in vesuvianites from Lower Silesia, Poland
Affiliation: Academy of Science of Ukraine, Institute of Geochemistry, Mineralogy and Ore Formation, Kiev, Ukraine
Pages: 1345-1352
Published: 199512
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 32
Accession Number: 1996-014807
Categories: Mineralogy of silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables
Secondary Affiliation: Academy of Mining and Metallurgy, POL, PolandWroclaw University, POL, Poland
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 199606
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