HYDROTHERMAL SYNTHESIS OF STRONTIUM HYDROXYAPATITE FINE SINGLE CRYSTALS

Abstract

Strontium hydroxyapatite fine single crystals were synthesized hydrothermally at 200°C under the saturated vaper pressure of solution for 10 h. The crystals were nonaggregated particles with hexagonal prismatic shape of about 110 nm in length with aspect ratio of about 6.5. Their lattice parameters (a=0.9767 nm, c=0.7278 nm) were in good agreement with those of the stoichiometric Sr apatite. An X-ray profile analysis indicated that the crystals had no compositional fluctuation. The Sr/P atomic ratio of these crystals was 1.67 of correct apatite stoichiometry by ICP analysis.