Research Article

Raman spectroscopic study of the vivianite arsenate minerals

  1. Ray L. Frost1,*,
  2. Wayde Martens1,
  3. Peter A. Williams2,
  4. J. Theo Kloprogge1

Article first published online: 13 OCT 2003

DOI: 10.1002/jrs.1049

Issue

Journal of Raman Spectroscopy

Journal of Raman Spectroscopy

Volume 34, Issue 10, pages 751–759, October 2003

Additional Information

How to Cite

Frost, R. L., Martens, W., Williams, P. A. and Kloprogge, J. T. (2003), Raman spectroscopic study of the vivianite arsenate minerals. Journal of Raman Spectroscopy, 34: 751–759. doi: 10.1002/jrs.1049

Author Information

  1. 1

    Inorganic Materials Research Program, School of Physical and Chemical Sciences, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland 4001, Australia

  2. 2

    School of Science, Food and Horticulture, University of Western Sydney, Locked Bag 1797, Penrith South DC, New South Wales 1797, Australia

*Inorganic Materials Research Program, School of Physical and Chemical Sciences, Queensland University of Technology, 2 George street, GPO Box 2434, Brisbane, Queensland 4001, Australia.

Publication History

  1. Issue published online: 13 OCT 2003
  2. Article first published online: 13 OCT 2003
  3. Manuscript Accepted: 2 JUN 2003
  4. Manuscript Received: 5 FEB 2003

Funded by

  • Australian Research Council.

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Keywords:

  • annabergite;
  • erythrite;
  • hörnesite;
  • köttigite;
  • parasymplesite;
  • vivianite;
  • arsenate minerals

Abstract

The molecular structures of the vivianite-type arsenate minerals were studied using a combination of Raman and infrared spectroscopy. The Raman spectra of the hydroxyl-stretching regions are complex with overlapping bands at 3419, 3209, 3185 and 3010 cm−1. This complexity is reflected in the water HOH bending modes with strong infrared bands in the 1660–1685 cm−1 region indicating strong hydrogen bonding to arsenate anions in adjacent layers. The Raman arsenate AsO stretching region shows strong similarity between the vivianite arsenate minerals. In the infrared spectra complexity exists with multiple antisymmetric stretching vibrations observed, indicating a reduction of symmetry. Strong infrared bands around 700 and 560 cm−1 are attributed to librational modes of water. Vibrational spectra enable the structure of the minerals to be determined and, whilst similarities exist in the spectral patterns, sufficient differences exist to determine the identification of the minerals. In particular, Raman spectroscopy assists in the identification of the complex isomorphous substitution in these vivianite arsenate minerals. Copyright © 2003 John Wiley & Sons, Ltd.

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