K J Rao
Articles written in Journal of Chemical Sciences
Volume 87 Issue 8 August 1978 pp 275-279 Physical and Theoretical
Sulphate glasses prepared from K2SO4−ZnSO4 system were doped with Fe2+, Co2+, Ni2+ and Cu2+ ions in the form of their sulphates. The spectra in the visible region indicated octahedral coordination of these ions. The spectral features remain unaffected in the entire composition range. Hence the zinc ion in these binary sulphate glasses is likely to retain octahedral coordination in the entire glass forming compositions.
Volume 92 Issue 1 January 1983 pp 65-71 Physical and Theoretical
Photoacoustic spectra of As−S, As−Se glasses as well as the As2(S,Se)3 glasses have been investigated. Photoacoustic spectra of powdered samples give results comparable to those obtained from transmission spectra, the latter studies requiring preparation of thin films. Temperature-dependent studies of the As2S3 glass have been carried out. Optical behaviour of these glasses has been interpreted in terms of homoatomic bonding defects.
Volume 94 Issue 3 June 1985 pp 449-456 Physical and Theoretical
Volume 96 Issue 5 March 1986 pp 383-388 Physical and Theoretical
Magnetic susceptibility studies of lead oxyhalide glasses containing high concentrations of transition metal oxides such as MnO and Fe2O3 have been performed. While they exhibit predominantly antiferromagnetic interactions, the low temperature (<100K) region is dominated by paramagnetic contributions. The behaviour in these glasses is found to be similar to that of covalent oxide glasses and is different from that of purely ionic sulphate glasses.
Volume 102 Issue 4 August 1990 pp 541-553 Physical and Theoretical
Fast ion conducting glasses in the system xAgI−(1−x)Ag2SeO4 (0·5≤x≤0·75), prepared by melt quenching route have been investigated in detail. Spectroscopic, thermal and electrical properties including dielectric relaxation have been studied. An attempt is made to understand the variation in these properties by using a structural unpinning model.
Volume 107 Issue 5 October 1995 pp 573-580 Physical And Theoretical
Glasses of the alkali tin phosphate system have been investigated. The infrared absorption and fluorescence spectra of the glasses have been examined. It is found that tin is present in both+2 and+4 oxidation states. Also tin ions occupy four- or six-coordinated sites in the glass.
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