title: Characterization of clinohumite by selected spectroscopic methods.
abstract: 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.
authors.affiliation: Department of Physics, SVD College, Kadapa 516003, India.
authors.forename: S Lakshmi
authors.initials: SL
authors.lastname: Reddy
authors.forename: N C Gangi
authors.initials: NC
authors.lastname: Reddy
authors.forename: G Siva
authors.initials: GS
authors.lastname: Reddy
authors.forename: B Jagannatha
authors.initials: BJ
authors.lastname: Reddy
authors.forename: Ray L
authors.initials: RL
authors.lastname: Frost
mesh_terms: D000042:Absorption; D004578:Electron Spin Resonance Spectroscopy; D008345:Manganese / Q000032:analysis*; D008903:Minerals / Q000737:chemistry*; D055095:Optics and Photonics; D012828:Silicones / Q000737:chemistry*; D019265:Spectroscopy, Near-Infrared
chemical_list: D008903:Minerals; D012828:Silicones; D008345:Manganese