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


Autoria(s): Bahfenne, Silmarilly; Reddy, B. Jagannadha; Frost, Ray; Graham, Jessica
Data(s)

2008

Resumo

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.

Formato

application/pdf

Identificador

http://eprints.qut.edu.au/30899/

Publicador

Elsevier

Relação

http://eprints.qut.edu.au/30899/1/30899.pdf

DOI:10.1016/j.poly.2008.03.019

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.

Direitos

Copyright 2008 Elsevier

Fonte

Faculty of Science and Technology

Palavras-Chave #030200 INORGANIC CHEMISTRY #030600 PHYSICAL CHEMISTRY (INCL. STRUCTURAL) #030603 Colloid and Surface Chemistry #030606 Structural Chemistry and Spectroscopy #Artinite, Dypingite, Carbonate, NIR spectroscopy, Vibrational spectroscopy, OH-overtones, Cation Substitution Effects
Tipo

Journal Article