S M Dharmaprakash
Articles written in Bulletin of Materials Science
Volume 8 Issue 4 October 1986 pp 519-525
Studies on etching of gel-grown barium oxalate dihydrate crystals
Etch pits produced by selective etchants such as 1 M HCl, 1 M HNO3, 4 M BaCl2, 4 M NH4Cl and 4 M NH4Cl-1 M HCl solutions on the as-grown {110} faces of barium oxalate dihydrate crystals are illustrated and explained. The kinetics of etching is studied. From Arrhenius plots, the activation energy of etching and the pre-exponential factor are computed. An empirical equation governing the kinetics has been suggested.
Volume 12 Issue 5 December 1989 pp 465-468
Thermal properties of barium-cadmium oxalate crystals
The kinetics and thermodynamics of the thermal dehydration of crystalline powders of BaC2O4·2H2O, CdC2O4·3H2O and Ba1−
Volume 14 Issue 5 October 1991 pp 1219-1223
Physico-chemical characterization of BaHPO4 crystals
K C Hebbar S M Dharmaprakash P Mohan Rao
Characterization of the gel-grown barium hydrogen phosphate (BHP) crystals was performed by utilizing the techniques of chemical analysis, X-ray diffraction, infrared and thermal behaviour. The results show that BHP crystals had chemical composition BaHPO4 at room temperature. TG and DTA studies revealed the BHP crystals to be anhydrous at room temperature and decomposed at temperatures above 370°C and the decomposition was an endothermic process. Magnetic susceptibility measurements indicate the material to be diamagnetic.
Volume 21 Issue 1 February 1998 pp 87-92 Research Articles
Optical and structural characteristics of strontium doped calcium tartrate crystals
K Suryanarayana S M Dharmaprakash K Sooryanarayana
We report here on the optical and structural characteristics carried out on strontium doped calcium tartrate tetrahedral single crystalline materials obtained by diffusing calcium and strontium ions through silica gel impregnated with optically active tartaric acid. Linear optical properties of this material such as refractive index, birefringence and transmission characteristics were measured in the wavelength range 200 nm <
Volume 45, 2022
All articles
Continuous Article Publishing mode
Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
Chemical Sciences 2020
Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
Physical Sciences 2020
Click here for Editorial Note on CAP Mode
© 2021-2022 Indian Academy of Sciences, Bengaluru.