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Electrical conductivity and thermal dehydration studies of hydrated barium oxalate and barium cadmium oxalate crystals
Author(s) -
Dharmaprakash S. M.,
Rao P. Mohan
Publication year - 1989
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170240711
Subject(s) - barium , oxalate , conductivity , dehydration , cadmium , inorganic chemistry , chemistry , molecule , electrical resistivity and conductivity , materials science , atmospheric temperature range , analytical chemistry (journal) , chromatography , thermodynamics , organic chemistry , biochemistry , physics , electrical engineering , engineering
The measurement of electrical conductivity for the investigation of the number of water molecules present in the hydrated barium oxalate, and barium cadmium oxalate lattice have been carried out in the temperature range 30 to 415 °C. The dehydration temperature and the number of water molecules jettisoned out of the structure at a particular temperature is estimated from the sharp increase in conductivity at these points. The almost abrupt increase of conductivity is attributed to the increase in the number of mobile charge carriers viz., H + and OH − ions generated from the escaping water molecules. Samples in the form of pellets with and without silver paste applied, showed different behaviour with respect to conductivity of the material upto the completion of dehydration. The study of electrical conductivity in association with the thermal behaviour has been used to understand the mechanism of conduction.