Characterization of clinohumite by selected spectroscopic methods

Clinohumite, a humite group mineral, originated from Pamir Mountains, USSR, is used in the present work. Optical absorption, electron paramagnetic resonance (EPR), near infrared (NIR) and Mössbauer techniques are used in the characterization of the mineral sample. The optical absorption spectrum ind...

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Veröffentlicht in:	Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Molecular and biomolecular spectroscopy, 2006-11, Vol.65 (3), p.684-688
Hauptverfasser:	Reddy, S. Lakshmi, Reddy, N.C. Gangi, Reddy, G. Siva, Reddy, B. Jagannatha, Frost, Ray L.
Format:	Artikel
Sprache:	eng
Schlagworte:	Absorption Clinohumite Electron paramagnetic resonance Electron Spin Resonance Spectroscopy Humite Manganese - analysis Minerals - chemistry Mössbauer spectroscopy Near infrared spectroscopy Optical absorption Optics and Photonics Silicones - chemistry Spectroscopy, Near-Infrared
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Beschreibung
Zusammenfassung:	Clinohumite, a humite group mineral, originated from Pamir Mountains, USSR, is used in the present work. Optical absorption, electron paramagnetic resonance (EPR), near infrared (NIR) and Mössbauer techniques are used in the characterization of the mineral sample. The optical absorption spectrum indicates that Fe(II) impurity is present in two sites with distorted octahedral structure. NIR results are attributed to water fundamentals. EPR studies on powder sample confirm the presence of Mn(II) in three different sites and also an iron impurity. Mössbauer studies confirm the presence of iron impurity in two different sites.
ISSN:	1386-1425
DOI:	10.1016/j.saa.2005.12.030