Vibrational spectroscopic study of the mineral pitticite Fe, AsO4, SO4, H2O

Frost, Ray L., Xi, Yunfei, Tan, Keqin, Millar, Graeme J., & Palmer, Sara J. (2012) Vibrational spectroscopic study of the mineral pitticite Fe, AsO4, SO4, H2O. Spectrochimica Acta Part A : Molecular and Biomolecular Spectroscopy, 85(1), pp. 173-178.

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Some minerals are colloidal and show no X-ray diffraction patterns. Vibrational spectroscopy offers one of the few methods for the determination of the structure of these minerals. Among this group of minerals is pitticite, simply described as (Fe, AsO4, SO4, H2O). In this work, the analogue of the mineral pitticite has been synthesised. The objective of this research is to determine the molecular structure of the mineral pitticite using vibrational spectroscopy. Raman and infrared bands are attributed to the AsO43−, SO42− and water stretching and bending vibrations. The Raman spectrum of the pitticite analogue shows intense peaks at 845 and 837 cm−1 assigned to the AsO43− stretching vibrations. Raman bands at 1096 and 1182 cm−1 are attributed to the SO42− antisymmetric stretching bands. Raman spectroscopy offers a useful method for the analysis of such colloidal minerals.

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ID Code: 58083
Item Type: Journal Article
Refereed: Yes
Keywords: Raman spectroscopy, Pitticite, Arsenate, Sulphate, Scorodite, Känkite
DOI: 10.1016/j.saa.2011.09.057
ISSN: 1386-1425
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2011 Elsevier B.V.
Copyright Statement: All rights reserved.
Deposited On: 12 Mar 2013 23:36
Last Modified: 02 Dec 2014 12:19

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