Near-infrared spectroscopy of aurichalcite (Zn,Cu2+)5(CO3)2(OH)6
In this endeavour near-infrared spectroscopy studies show an evidence for variable composition in aurichalcite minerals of zinc copper carbonate hydroxides. The observation of a broad feature in the electronic part of the spectrum around 11500 cm-1 (0.87 µm) is a strong indication of Cu2+ substitution for Zn2+ in the mineral. Overtones of OH vibrations in the spectra from 7250 to 5400 cm-1 (1.38 to 1.85µm) show strong hydrogen bonding in these carbonates. A band common to spectra of all carbonates appears near 5400 cm-1 (1.85 µm) due to the combination of both OH-stretching and HOH-bending vibrations, may be attributed to adsorbed water by the minerals. Aurichalcite minerals display a spectral sequence of five absorpton bands with variation of both band positions and intenities and this is the chief spectral feature observed in the range 5200 -5100 cm-1 (1.92 - 2.38 µm) due to vibrational processes of the carbonate ion. The frequency shifts of carbonate bands suggest the effect of divalent cations and or variations of Zn/Cu ratio in aurichalcite minerals.
Impact and interest:
Citation counts are sourced monthly from and citation databases.
These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.
Citations counts from theindexing service can be viewed at the linked Google Scholar™ search.
|Item Type:||Journal Article|
|Additional Information:||Self-archiving of the author-version is not yet supported by this publisher. For more information, please refer to the journal's website (see link) or contact the author. Author contact details: email@example.com|
|Keywords:||aurichalcite, hydrozincite, hydroxy carbonates, near, infrared spectroscopy, Cu2+, Zn2+, overtones and combination bands of OH, and CO32, fundamentals|
|Subjects:||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|
|Copyright Owner:||Copyright 2007 NIR Publications|
|Deposited On:||24 Apr 2007|
|Last Modified:||29 Feb 2012 13:38|
Repository Staff Only: item control page