Abstract
A detailed study of the variation in nucleation density and growth of lead hydrogen phosphate (LHP), PbHPO4, single crystals as a function concentration of feed solution, gel aging, gel density, gel pH and replenishment programme is presented. While high density and high pH gels produce opaque LHP crystals, good quality transparent LHP single crystals are obtained at low density and low pH gels. It is observed that gel aging considerably reduces the number of nucleation sites. The growth of LHP crystals in silica gels under the influence of an externally applied uniform electric field is also investigated, The implications are discussed.
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