A Raman spectroscopic study of the basic carbonate mineral callaghanite Cu2Mg2(CO3)(OH)6⋅2H2O

Čejka, Jiří, Sejkora, Jiří, Jebavá, Ivana, Xi, Yunfei, Couperthwaite, Sara J., & Frost, Ray L. (2013) A Raman spectroscopic study of the basic carbonate mineral callaghanite Cu2Mg2(CO3)(OH)6⋅2H2O. Spectrochimica Acta Part A : Molecular and Biomolecular Spectroscopy, 108, pp. 171-176.

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Abstract

Raman spectrum of callaghanite, Cu2Mg2(CO3)(OH)6⋅2H2O, was studied and compared with published Raman spectra of azurite, malachite and hydromagnesite. Stretching and bending vibrations of carbonate and hydroxyl units and water molecules were tentatively assigned. Approximate O–H…O hydrogen bond lengths were inferred from the spectra. Because of the high content of hydroxyl ions in the crystal structure in comparison with low content of carbonate units, callaghanite should be better classified as a carbonatohydroxide than a hydroxycarbonate.

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ID Code: 58840
Item Type: Journal Article
Refereed: Yes
Keywords: Callaghanite, Carbonatohydroxide, Raman spectroscopy, Hydroxyl ions, Carbonate ions, Molecular water
DOI: 10.1016/j.saa.2013.01.033
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 2013 Elsevier B.V. All rights reserved
Copyright Statement: This is the author’s version of a work that was accepted for publication in Spectrochimica Acta Part A : Molecular and Biomolecular Spectroscopy. 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 Spectrochimica Acta Part A : Molecular and Biomolecular Spectroscopy, [VOL 108, ISSUE -, (2013)] DOI: 10.1016/j.saa.2013.01.033
Deposited On: 04 Apr 2013 01:43
Last Modified: 05 May 2014 04:14

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