title: Ionoluminescence studies of natural kyanite mineral from different parts of Indian origin.
abstract: Ionoluminescence (IL) studies of two natural kyanite (Al(2)SiO(5)) minerals collected from different regions of India was carried out using 120 MeV Ag(9+) ions in the fluence range of 1.50-10.5 × 10(11)ions/cm(2). Identical emission peaks were observed in both the samples at ~416, 463, 530-540 nm along with other emission peaks at ~689 nm, 706 nm (sharp) and 770 nm (broad). The sharp emission peaks at 689 nm correspond to R lines of Cr(3+) impurities and are related to transition of (2)E(g)→(4)A(2g). The sharp and broad emission peaks in the range of 706-770 nm are attributed to Fe(3+) impurities and are related to the transition of (4)T(1g)→(6)A(1g). The peak in the range of 530-540 nm is attributed to Mn(2+) impurities and is related to the transition of (4)T(1)→(6)A(1). IL peak intensity decreases with the Ag(9+) ion fluence which might be due to the thermal quenching/amorphization, caused by the ion beam irradiation. The amorphization in the sample was explained with the help of thermal spike model (TSM). These results demonstrated that IL is a very sensitive technique for impurity characterization and differentiating the origin of minerals.
authors: Prof. C.N.R. Rao Centre for Advanced Materials Research, Tumkur University, Tumkur-572103, India. bhushanvl@rediffmail.com
authors: H
authors: H
authors: Nagabhushana
authors: Fouran
authors: F
authors: Singh
authors: S C
authors: SC
authors: Sharma
authors: B M
authors: BM
authors: Nagabhushana
authors: R P S
authors: RP
authors: Chakradhar
mesh_terms: D000538:Aluminum Silicates / Q000737:chemistry*; D007194:India; D007477:Ions; D008163:Luminescent Measurements / Q000379:methods*; D008903:Minerals / Q000737:chemistry*; D012834:Silver / Q000737:chemistry; D013057:Spectrum Analysis
chemical_list: D000538:Aluminum Silicates; D007477:Ions; D008903:Minerals; C121089:kyanite; D012834:Silver