Spectroscopic and structural characterization of pascoite.
| Autor: | Reddy GU; Department of Physics, S.V.D. College, Kadapa 516003, India., Reddy RR, Reddy SL, Frost RL, Endo T |
|---|---|
| Jazyk: | angličtina |
| Zdroj: | Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy [Spectrochim Acta A Mol Biomol Spectrosc] 2011 Sep; Vol. 79 (5), pp. 1402-5. Date of Electronic Publication: 2011 Jun 01. |
| DOI: | 10.1016/j.saa.2011.04.075 |
| Abstrakt: | Pascoite mineral having yellow-orange colour of Colorado, USA origin has been characterized by EPR, optical and NIR spectroscopy. The colour dark red-orange to yellow-orange colour of the pascoite indicates that the mineral contain mixed valency of vanadium. The optical spectrum exhibits a number of electronic bands due to presence of VO(II) ions in the mineral. From EPR studies, the parameters of g, A are evaluated and the data confirm that the ion is in distorted octahedron. Optical absorption studies reveal that two sets of VO(II) is in distorted octahedron. The bands in NIR spectra are due to the overtones and combinations of water molecules. (Copyright © 2011. Published by Elsevier B.V.) |
| Databáze: | MEDLINE |
| Externí odkaz: |
|
Full Text from ScienceDirect