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Hydrothermal Synthesis of Hydroxyapatite and Pollucite from Calcium Phosphate

  • Masaaki Kaneko (a1), Yuichi Shoji (a1), Hiroyuki Matsuura (a1) and Nakamichi Yamasaki (a2)

Abstract

Hydroxyapatite (HAP : Ca10(PO4 ) 6 (OH) 2 ) and aluminosili-cate were easily synthesized using a hydrothermal process with mixing ratios of Ca/P=1.67 (Ca(PO3)2 and Ca(OH)2) and Si/Al=4 (SiO2 and Al(OH)3). The temperature was kept constant at 573 K for 60 minutes. .Cesium (Cs) and Cerium (Ce) contained in Ca(PO3)2 , were found to take on a stable form in the pollucite (CsAlSi2O6) structure and the monazite (CePO4) structure.

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