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Growth of crystals of calcium sulphate in silica gel in presence of additive and their characterisation
Author(s) -
Kumareson P.,
Devanarayanan S.
Publication year - 1987
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.2170221204
Subject(s) - thermogravimetric analysis , barium , raman spectroscopy , calcium , infrared spectroscopy , chemistry , spectroscopy , barium chloride , calcium compounds , materials science , inorganic chemistry , crystallography , analytical chemistry (journal) , organic chemistry , optics , physics , quantum mechanics
Procedure for the growth of calcium sulphate dihydrate crystals in silica gel, in the presence of barium chloride as additive, is described. Optimum conditions for the growth of good quality crystals are worked out. The crystals are characterised by laser Raman spectroscopy, infrared spectroscopy, thermogravimetric analysis and Atomic absorption spectroscopy. It is shown that crystals in the presence of the additive have a greater degree of perfection than those without additive. Amount of water in the crystals is estimated as 20.97%. Presence of calcium and absence of barium in the crystals are indicated.