Electron paramagnetic resonance, optical absorption and Raman spectral studies on a pyrite/chalcopyrite mineral.
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 Å. 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.
Dept. of Physics, S.V.D. College, Kadapa 516 003, India.
G
G
Udayabhaskar Reddy
K
K
Seshamaheswaramma
Yoshinobu
Y
Nakamura
S
S
Lakshmi Reddy
Ray L
RL
Frost
Tamio
T
Endo
D000042:Absorption; D003300:Copper / Q000737:chemistry*; D004578:Electron Spin Resonance Spectroscopy; D007501:Iron / Q000737:chemistry*; D008903:Minerals / Q000737:chemistry*; D055620:Optical Phenomena; D011208:Powders; D019265:Spectroscopy, Near-Infrared; D013059:Spectrum Analysis, Raman; D013440:Sulfides / Q000737:chemistry*; D013696:Temperature; D014961:X-Ray Diffraction
D008903:Minerals; D011208:Powders; D013440:Sulfides; C012819:chalcopyrite; C011342:pyrite; D003300:Copper; D007501:Iron