Electron paramagnetic resonance, optical absorption and IR spectroscopic studies of the sulphate mineral apjohnite
Frost, Ray L., Reddy, S. Lakshmi , Reddy, B. Jagannatha, Wain, Daria L., Reddy, G. Siva , & Martens, Wayde N. (2006) Electron paramagnetic resonance, optical absorption and IR spectroscopic studies of the sulphate mineral apjohnite. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 65(5), pp. 1227-1233.
Apjohnite, a naturally occurring Mn-bearing pseudo-alum from Terlano, Bolzano, Italy has been characterized by EPR, optical, IR and Raman spectroscopy. The optical spectrum exhibits a number of electronic bands around 400 nm due to Mn(II) ion in apjohnite. From EPR studies the parameters derived, g = 2.0 and A = 8.82 mT confirm MnO(H2O)5 distorted octahedra. The presence of iron impurity in the mineral is reflected by a broad band centered around 8400 cm-1 in the NIR spectrum. A complex band profile appears strongly both in IR and Raman spectra with four component bands around 1100 cm-1 due to the reduction of symmetry for sulphate ion in the mineral. A strong pair of IR bands at 1681 and 1619 cm-1 with variable intensity is a proof for the presence of water in two states in the structure of apjohnite.
Impact and interest:
Citation countsare sourced monthly fromand 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.
Full-text downloadsdisplays the total number of times this work’s files (e.g., a PDF) have been downloaded from QUT ePrints as well as the number of downloads in the previous 365 days. The count includes downloads for all files if a work has more than one.
|Item Type:||Journal Article|
|Keywords:||Apjohnite, Pseudo, alum, Optical absorption spectrum, EPR, Near, infrared spectroscopy, IR and Raman spectroscopy|
|Subjects:||Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000)|
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 2006 Elsevier|
|Copyright Statement:||Reproduced in accordance with the copyright policy of the publisher.|
|Deposited On:||16 Nov 2006|
|Last Modified:||29 Feb 2012 23:23|
Repository Staff Only: item control page