Raman spectroscopy of three polymorphs of BiVO4: clinobisvanite, dreyerite and pucherite, with comparisons to (VO4)3-bearing -minerals: namibite, pottsite and schumacherite

Frost, Ray L., Henry, Dermot A., Weier, Matt L., & Martens, Wayde N. (2006) Raman spectroscopy of three polymorphs of BiVO4: clinobisvanite, dreyerite and pucherite, with comparisons to (VO4)3-bearing -minerals: namibite, pottsite and schumacherite. Journal of Raman Spectroscopy, 37(7), pp. 722-732.

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Abstract

Both Raman and infrared spectroscopy have been used to characterise the three phase related minerals dreyerite (tetragonal BiVO4 ), pucherite (orthorhombic BiVO4) and clinobisvanite (monoclinic BiVO4 ) and a comparison of the spectra is made with that of the minerals namibite (Cu(BiO2)VO4(OH)), schumacherite ((Bi3O(OH)(VO4)2) and pottsite (PbBiH(VO4)2.2H2O). Pucherite, clinobisvanite and namibite are characterised by VO4 stretching vibrations at 872, 824 and 846 cm-1. The Raman spectrum of dreyerite shows complexity in the 750 to 950 cm-1 region with two intense bands at 836 and 790 cm-1 assigned to the symmetric and antisymmetric VO4 modes. The minerals schumacherite and pottsite are characterised by bands at 846 and 874 cm-1. In both the infrared and Raman spectra bands are observed in the 1000- 1100 cm-1 region which are attributed to the antisymmetric stretching modes. The Raman spectra of the low wavenumber region are complex. Bands are identified in the 328 to 370 cm-1 region and in the 404 to 498 cm-1 region and are assigned to the ν2 and ν4 bending modes. The minerals namibite and schumacherite are characterised by intense bands at 3514 and 3589 cm-1 assigned to the symmetric stretching vibrations of the OH units. Importantly Raman spectroscopy enables new insights into the chemistry of these bismuth vanadate minerals. Raman spectroscopy enables the identification of the bismuth vanadate minerals in mineral matrices where paragenetic relationships exist between the minerals.

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ID Code: 4763
Item Type: Journal Article
Refereed: Yes
Keywords: pucherite, namibite, schumacherite, clinobisvanite, dreyerite, vanadates, Raman spectroscopy, infrared spectroscopy
DOI: 10.1002/jrs.1499
ISSN: 0377-0486
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Past > Schools > School of Physical & Chemical Sciences
Copyright Owner: Copyright 2006 John Wiley & Sons
Copyright Statement: The definite version is available on publication at www3.interscience.wiley.com
Deposited On: 04 Aug 2006 00:00
Last Modified: 29 Feb 2012 13:24

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