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Optical absorption, infrared, Raman and EPR spectral studies on natural Iowaite mineral

Frost, Ray L., Reddy, S. Lakshmi, Maheswaramma, K. Sesha, Reddy, G. Siva, Reddy, B. Jagannadha, & Endo , Tamio (2010) Optical absorption, infrared, Raman and EPR spectral studies on natural Iowaite mineral. Transition Metal Chemistry, 35(3), pp. 331-316.

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Abstract

Natural iowaite, magnesium–ferric oxychloride mineral having light green color originating from Australia has been characterized by EPR, optical, IR, and Raman spectroscopy. The optical spectrum exhibits a number of electronic bands due to both Fe(III) and Mn(II) ions in iowaite. From EPR studies, the g values are calculated for Fe(III) and g and A values for Mn(II). EPR and optical absorption studies confirm that Fe(III) and Mn(II) are in distorted octahedral geometry. The bands that appear both in NIR and Raman spectra are due to the overtones and combinations of water and carbonate molecules. Thus EPR, optical, and Raman spectroscopy have proven most useful for the study of the chemistry of natural iowaite and chemical changes in the mineral.

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ID Code: 31608
Item Type: Journal Article
Additional URLs:
Keywords: Iowaite mineral, hydrotalcite, optical absorption spectrum, EPR spectrum,
DOI: 10.1007/s11243-010-9331-8
ISSN: 0340-4285
Subjects: 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) > Structural Chemistry and Spectroscopy (030606)
Divisions: Past > Schools > Chemistry
Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2010 Springer Verlag
Copyright Statement: The original publication is available at SpringerLink http://www.springerlink.com
Deposited On: 06 Apr 2010 09:51
Last Modified: 01 Mar 2012 00:15

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