Electron paramagnetic resonance, optical absorption and Raman spectral studies on a pyrite/chalcopyrite mineral

被引：11

作者：

Reddy, G. Udayabhaskar ^{[1
]}

Seshamaheswaramma, K. ^{[1
]}

Nakamura, Yoshinobu ^{[2
]}

Reddy, S. Lakshmi ^{[1
]}

Frost, Ray L. ^{[3
]}

Endo, Tamio ^{[4
]}

机构：

[1] SVD Coll, Dept Phys, Kadapa 516003, India

[2] Univ Tokyo, Sch Engn, Dept Appl Chem, Tokyo 1138654, Japan

[3] Queensland Univ Technol, Inorgan Mat Res Program, Brisbane, Qld 4001, Australia

[4] Mie Univ, Fac Engn, Tsu, Mie 5148507, Japan

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2012年 / 96卷

关键词：

Pyrite/chalcopyrite; XRD; EPR; Optical absorption spectra; NIR spectra; Raman spectrum; SITE SYMMETRY; DIVALENT IRON; CHALCOPYRITE; COPPER; EPR;

D O I：

10.1016/j.saa.2012.04.093

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

Pyrite and chalcopyrite mineral samples from Mangampet barite mine, Kadapa, Andhra Pradesh, India are used in the present study. XRD data indicate that the pyrite mineral has a face centered cubic lattice structure with lattice constant 5.4179 angstrom. Also it possesses an average particle size of 91.9 nm. An EPR study on the powdered samples confirms the presence of iron in pyrite and iron and Mn(II) in chalcopyrite. The optical absorption spectrum of chalcopyrite indicates presence of copper which is in a distorted octahedral environment. NIR results confirm the presence of water fundamentals and Raman spectrum reveals the presence of water and sulfate ions. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：310 / 315

页数：6

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