Raman spectroscopic study of cinnabar (HgS), realgar (As4S4), and orpiment (As2S3) at 298 and 77K

Frost, Ray L., Martens, Wayde N., & Kloprogge, J. Theo (2002) Raman spectroscopic study of cinnabar (HgS), realgar (As4S4), and orpiment (As2S3) at 298 and 77K. Neues Jahrbuch fuer Mineralogie, Monatshefte, 2002(10), pp. 469-480.

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The use of a Raman microscope combined with a thermal stage enabled the Raman spectra of the three minerals cinnabar, realgar and orpiment. Each of these minerals is of archaeological and medieval interest because of their use as colouring agents. The spectra of these sulphides of Hg and As may be conveniently divided into three sections namely (a) the region centred upon 355 cm-1 where the stretching vibrations are observed (b) the region centred upon 250 cm-1 ascribed to the bending vibrations and (c) the region below 100 cm-1 assigned to the lattice modes. Cinnabar Raman spectra displayed prominent bands 353, 342, 290, 277 and 253cm-1. These bands are assigned to HgS stretching modes and are orientation dependent. The Raman spectrum of realgar shows AsS stretching vibrations at 374, 367, 353, 340 and 327cm-1 and bending modes at 219, 210, 191 and 181cm-1. Orpiment also displays five Raman bands at 382, 355, 325, 310 and 294 cm-1 with bending modes at 202 and 180 cm-1. Differences in the results between this work and published data are accounted for by the sample preparation and the advances in technology with improved signal to noise.

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ID Code: 22628
Item Type: Journal Article
Refereed: Yes
DOI: 10.1127/0028-3649/2002/2002-0469
ISSN: 0028-3649
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2002 E. Schweizerbart'sche Verlagsbuchhandlung
Deposited On: 17 Jun 2009 13:18
Last Modified: 03 Sep 2009 01:34

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