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The structure of mimetite, arsenian pyromorphite and hedyphane: A Raman spectroscopic study

Frost, Ray L., Bouzaid, Jocelyne M., & Palmer, Sara J. (2007) The structure of mimetite, arsenian pyromorphite and hedyphane: A Raman spectroscopic study. Polyhedron, 26(13), pp. 2964-2970.

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Abstract

The minerals mimetite Pb5(AsO4)3Cl , arsenian pyromorphite Pb5(PO4,AsO4)3Cl and hedyphane Pb3Ca2(AsO4)3Cl have been studied by Raman spectroscopy complimented with infrared spectroscopy. Mimetite is characterised by a band at 812-3 cm-1 attributed to the Ag mode. For the arsenian pyromorphite this band is observed at 818 cm-1 and for hedyphane at 819 cm-1. For mimetite and hedyphane bands at 788 and 765 cm-1 are attributed to Au and E1u vibrational modes and are both Raman and infrared active. For the arsenian pyromorphite, Raman bands at 917 to 1014 cm-1 are attributed to phosphate stretching vibrations. Raman spectroscopy clearly identifies bands attributable to isomorphous substitution of arsenate by phosphate. The observation of low intensity bands in the 3200 to 3550 cm-1 region are assigned to adsorbed water and OH units, thus indicating some replacement of chloride ions with hydroxyl ions.

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ID Code: 8840
Item Type: Journal Article
Keywords: arsenate, mimetite, hedyphane, arsenian pyromorphite, phosphate, isomorphous substitution, Raman spectroscopy
DOI: 10.1016/j.poly.2007.01.038
ISSN: 0277-5387
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Colloid and Surface Chemistry (030603)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Current > Research Centres > Science Research Centre
Copyright Owner: Copyright 2007 Elsevier
Copyright Statement: Reproduced in accordance with the copyright policy of the publisher.
Deposited On: 01 Aug 2007
Last Modified: 06 May 2014 09:44

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