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Synthesis and Raman spectroscopic characterisation of the oxalate mineral wheatleyite Na2Cu2+(C2O4)2.2H2O

Frost, Ray L., Locke, Ashley J., & Martens, Wayde N. (2008) Synthesis and Raman spectroscopic characterisation of the oxalate mineral wheatleyite Na2Cu2+(C2O4)2.2H2O. Journal of Raman Spectroscopy, 39(7), pp. 901-908.

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Abstract

The mineral wheatleyite was synthesised and characterised by Raman spectroscopy complimented with infrared spectroscopy. Two Raman bands at 1434 and 1470 cm-1 are assigned to the ν(C-O) stretching mode and implies two independent oxalate anions. Two intense Raman bands observed at 904 and 860 cm-1 are assigned to the ν(C-C) stretching mode and support the concept of two non-equivalent oxalate units in the wheatleyite structure. Two strong bands observed at 565 and 585 cm-1 are assigned to the symmetric CCO in plane bending modes. The Raman band at 387 cm-1 is attributed to the CuO stretching vibration and the bands at 127 and 173 cm-1 to OCuO bending vibrations. A comparison is made with Raman spectra of selected natural oxalate bearing minerals. Oxalates are markers or indicators of environmental events. Oxalates are readily determined by Raman spectroscopy. Thus deterioration of works of art, biogeochemical cycles, plant metal complexation, the presence of pigments and minerals formed in caves can be analysed.

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ID Code: 13827
Item Type: Journal Article
Keywords: oxalate, wheatlyite, Raman Spectroscopy, Infrared, vibrational spectroscopy
DOI: 10.1002/jrs.1932
ISSN: 0377-0486
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)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Colloid and Surface Chemistry (030603)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Past > Schools > School of Physical & Chemical Sciences
Copyright Owner: Copyright 2008 John Wiley and Sons
Copyright Statement: The definite version is available on publication at www3.interscience.wiley.com
Deposited On: 20 Jun 2008
Last Modified: 29 Feb 2012 23:46

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