Growth of single crystals of some complex salts in silica gels

Abstract

Single crystals of ammonium nickel sulphate, potassium nickel sulphate, ammonium alum and potassium alum are grown in sodium-metasilicate gels. The method of gel preparation and growth procedure are described. Both single diffusion and double diffusion methods are used. Studies on nucleation and chamcterisation of crystals are also reported. Crystals grown are illustrated.

Study of gel grown mixed crystals of Ba x Ca(1−x)(IO3)4

“…In the field of crystal growth, gel technique has become more popular and has been used more (Joshi and Trivedi 1970;Ittyachen and Kurien 1979;Joshi et al 1981). A variety of crystals required for the purpose of research and application can be grown in silica gels.…”

Growth, Laser Raman, Thermal, Edax and Photoluminescence Studies of Pure and Calcium Doped Zinc Hydrogen Phosphate Crystals Using Single Diffusion Technique

“…When the concentration of this compound exceeds the solubility limits, crystals will be formed, the main function of the silica gel being to control the flow of reacting ions [1][2][3][4][5]. Doped crystals growth has scarcely been studied by employing the gel technique [6][7] and the field is in an early stage of development with many opportunities to create new species. Most of the phosphate compounds are in soluble in water and decompose before melting.…”

Optical Topographic Studies on the Natural Iron Pyrite (FeS2) Crystals

“…It is known that all the phenomena of growth and dissolution of crystals are perfectly pictured on their habit faces (JOSHI et al 1980). Several investigations have been made (JOSHI et al 1968(JOSHI et al , 1972(JOSHI et al , 1980SUNAGAWA 1967SUNAGAWA , 1977 on growth mechanisms of various crystals, basing upon the studies of the surface structures of their habit faces. Therefore, t o understand the growth of naturally occurring iron pyrite crystals, detailed microtopographic studies have been carried out and the findings are reported in the present paper.…”