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Raman spectroscopy of descloizite and mottramite at 298 and 77 K

Frost, Ray L., Williams, Peter, Kloprogge, J. Theo, & Leverett, Peter (2001) Raman spectroscopy of descloizite and mottramite at 298 and 77 K. Journal of Raman Spectroscopy, 32(11), pp. 906-911.

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Abstract

The Raman spectra of the isomorphous series descloizite [PbZn(VO4)(OH)] and mottramite [PbCu(VO4) (OH)] were obtained at 298 and 77 K. The Raman band at 844 cm-1, assigned to the 1 symmetric (VO4-) stretching mode for descloizite, is shifted to 814 cm-1 for mottramite. The 3 mode of descloizite is observed as a single band at 777 cm-1 but this mode is more complex for mottramite with three bands observed in the 77 K spectrum at 811, 785 and 767 cm-1. The bending mode (2) is observed at 437 cm-1 for descloizite and at 426 cm-1 for mottramite. The 3 region is complex for both minerals and this is attributed to symmetry reduction of the vanadate unit from Td to Cs. Collecting Raman spectra at 77 K allowed better band separation with observation of additional bands ascribed to the removal of degeneracy.

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ID Code: 22252
Item Type: Journal Article
DOI: 10.1002/jrs.758
ISSN: 1097-4555
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2001 John Wiley and Sons
Deposited On: 17 Jun 2009 23:09
Last Modified: 11 Aug 2011 01:33

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