Minerals from Macedonia V.Characterization of gypsum, barite and their synthetic analogues by FTIR and RAMAN spectroscopy

Stefov, Viktor and Jovanovski, Gligor and Shoptrajanov, Bojan and Minceva-Sukarova, Biljana and Dimitrovska, Sandra and Boev, Blazo (2000) Minerals from Macedonia V.Characterization of gypsum, barite and their synthetic analogues by FTIR and RAMAN spectroscopy. Geologica Macedonica, 14. pp. 61-66. ISSN 0352-1206

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Abstract

The Fourier transform infrared (FfIR) and Raman spectra of gypsum (CaS04'2H20) and barite (BaS04) from various localities in Macedonia were studied. Contrary to the group-theoretical predictions, it was found that the band originating from the V2 sulfate mode (expected at around 450 cm-I) does not appear in the infra­ red spectra of either gypsum or barite, apparently due to the high effective symmetry of the force field for this mode. The infrared and Raman spectra of natural gypsum and its synthetic analogue are very similar. On the other hand, slight frequency differences (especially pronounced in the region of the V3 sulfate modes) were registered in the infra­ red spectrum (and, to a considerably lesser extent in the Raman spectrum as well) of synthetic BaS0 4 when compared to the spectrum of mineral barite. Also studied were the FTIR and Raman spectra of a mineral previously character­ ized as anhydrite. Although its morphological characteristics (shape, color and transparency) were quite different from those of gypsum it was shown that the studied mineral is in fact gypsum.

Item Type: Article
Uncontrolled Keywords: sulfate minerals; gypsum; barite; Macedonia; FfIR and Raman spectroscopy
Subjects: Natural sciences > Other natural sciences
Divisions: Faculty of Natural and Technical Sciences
Depositing User: Blazo Boev
Date Deposited: 03 Dec 2012 14:42
Last Modified: 10 Jun 2013 09:33
URI: http://eprints.ugd.edu.mk/id/eprint/2945

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