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The structure of selected magnesium carbonate minerals : a near infrared and mid-infrared spectroscopic study

Bahfenne, Silmarilly, Reddy, B. Jagannadha, Frost, Ray, & Graham, Jessica (2008) The structure of selected magnesium carbonate minerals : a near infrared and mid-infrared spectroscopic study. Polyhedron, 27(9-10), pp. 2069-2076.

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Abstract

The approach to remove green house gases by pumping liquid CO2 several kilometres below the ground implies that many carbonate containing minerals will be formed. Among these minerals the formation of dypingite and artinite are possible; thus necessitating a study of such minerals. Two carbonate bearing minerals dypingite and artinite with a hydrotalcite related formulae have been characterised by a combination of infrared and near-infrared spectroscopy. The infrared spectra of both minerals are characterised by OH and water stretching vibrations. Both the first and second fundamental overtones of these bands are observed in the NIR spectra in the 7030 to 7235 cm-1 and 10490 to 10570 cm-1. Intense (CO3)2- symmetric and antisymmetric stretching vibrations confirm the distortion of the carbonate anion. The position of the water bending vibration indicates water is strongly hydrogen bonded to the carbonate anion in the mineral structure. Split NIR bands at around 8675 and 11100 cm-1 indicates that some replacement of magnesium ions by ferrous ions in the mineral structure has occurred.

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8 citations in Scopus
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7 citations in Web of Science®

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ID Code: 30899
Item Type: Journal Article
Keywords: Artinite, Dypingite, Carbonate, NIR spectroscopy, Vibrational spectroscopy, OH-overtones, Cation Substitution Effects
DOI: 10.1016/j.poly.2008.03.019
ISSN: 0277-5387
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > INORGANIC CHEMISTRY (030200)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Colloid and Surface Chemistry (030603)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2008 Elsevier
Deposited On: 12 Feb 2010 22:50
Last Modified: 01 Mar 2012 12:07

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