Vibrational spectroscopic characterization of the sulphate-carbonate mineral burkeite: Implications for evaporites

López, Andrés, Frost, Ray L., Xi, Yunfei, & Scholz, Ricardo (2014) Vibrational spectroscopic characterization of the sulphate-carbonate mineral burkeite: Implications for evaporites. Spectroscopy Letters, 47(7), pp. 564-570.

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Abstract

Burkeite formation is important in saline evaporites and in pipe scales. Burkeite is an anhydrous sulphate-carbonate with an apparent variable anion ratio. Such a formula with two oxyanions lends itself to vibrational spectroscopy. Two symmetric sulphate stretching modes are observed, indicating at least at the molecular level the nonequivalence of the sulphate ions in the burkeite structure. The strong Raman band at 1065 cm−1 is assigned to the carbonate symmetric stretching vibration. The series of Raman bands at 622, 635, 645, and 704 cm−1 are assigned to the ν4 sulphate bending modes. The observation of multiple bands supports the concept of a reduction in symmetry of the sulphate anion from T d to C 3v or even C 2v.

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ID Code: 83616
Item Type: Journal Article
Refereed: Yes
Keywords: Burkeite, Carbonate, Infrared spectroscopy, Raman spectroscopy, Sulphate, Thermal analysis
DOI: 10.1080/00387010.2013.825273
ISSN: 1532-2289
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2014 Taylor & Francis Group, LLC
Deposited On: 16 Apr 2015 00:08
Last Modified: 16 Apr 2015 00:08

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