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Molecular structural studies of the amorphous mineral pitticite Fe, AsO4, SO4, H2O

Frost, Ray L., Xi, Yunfei, Palmer, Sara J., & Tan, Keqin (2011) Molecular structural studies of the amorphous mineral pitticite Fe, AsO4, SO4, H2O. Journal of Molecular Structure, 1005(1-3), pp. 78-82.

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Abstract

Some minerals are colloidal and show no X-ray diffraction patterns. Vibrational spectroscopy offers one of the few methods for the assessment of the structure of these types of mineral. Among this group of minerals is pitticite simply described as Fe, AsO4, SO4, H2O. The objective of this research is to determine the molecular structure of the mineral pitticite using vibrational spectroscopy. Raman microscopy offers a useful method for the analysis of such colloidal minerals.

Raman and infrared bands are attributed to the , and water stretching vibrations. The Raman spectrum is dominated by a very intense sharp band at 983 cm−1 assigned to the symmetric stretching mode. A strong Raman band at 1041 cm−1 is observed and is assigned to the antisymmetric stretching mode. Low intensity Raman bands at 757 and 808 cm−1 may be assigned to the antisymmetric and symmetric stretching modes. Raman bands observed at 432 and 465 cm−1 are attributable to the doubly degenerate ν2(SO4)2- bending mode.

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4 citations in Web of Science®

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ID Code: 46869
Item Type: Journal Article
Additional URLs:
Keywords: Raman spectroscopy, pitticite, arsenate, sulphate
DOI: 10.1016/j.molstruc.2011.08.021
ISSN: 1872-8014
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Divisions: Past > Schools > Chemistry
Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2011 Elsevier BV
Copyright Statement: This is the author’s version of a work that was accepted for publication in Journal of Molecular Structure. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Molecular Structure, [VOL 1005, ISSUE 1-3, (2011)] DOI: 10.1016/j.molstruct.2011.08.021
Deposited On: 08 Nov 2011 16:14
Last Modified: 09 May 2014 06:28

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