Electron paramagnetic resonance and optical absorption spectral studies on tennantite and tetrahedrite minerals

Frost, Ray L., Reddy, S. Lakshmi, Fayazuddin, Mohammed, Reddy, N.C. Gangi, & Endo, Tamio (2008) Electron paramagnetic resonance and optical absorption spectral studies on tennantite and tetrahedrite minerals. Radiation Effects and Defects in Solids, 163(1), pp. 19-27.

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Abstract

The behaviour of transition metal ions in tetrahedrite and in tennantite have been studied by electron paramagnetic resonance and optical absorption spectroscopy in the UV-Vis and NIR regions. The ground state of Cu(II) ion in both the minerals is confirmed as 2B1g . In both the minerals, two sets of three characteristic bands observed in the optical absorption spectra are assigned to the transitions, 2B1g -> 2A1g, 2B1g ->2B2 and 2B1g ->2Eg of Cu(II) ion in tetragonal field. The presence of Fe(III) bands is an evidence for iron impurity in the tetrahedrite and Mn(II) in tennantite mineral. The copper content in tetrahedrite and tennantite is about 40wt %. The NIR spectra are due to water present in the samples.

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ID Code:	11318
Item Type:	Journal Article
Keywords:	EPMA, Tetrahedrite, tennantite mineral, copper, Fe(III), Mn(II), EPR, Optical absorption Spectrum
DOI:	10.1080/10420150701640033
ISSN:	1029-4953
Subjects:	Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Catalysis and Mechanisms of Reactions (030601) 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) 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 2008 Taylor & Francis
Copyright Statement:	First published in Radiation Effects and Defects in Solids 163(1):pp. 19-27.
Deposited On:	07 Jan 2008
Last Modified:	29 Feb 2012 23:49

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