HYDROTHERMAL AND SOLID-STATE SYNTHESIS OF SODIUM ZIRCONIUM SILICOPHOSPHATES
Academic Article
Overview
Identity
Additional Document Info
Other
View All
Overview
abstract
Nasicon has been prepared hydrothermally from zirconium phosphate, Zr(HPO4)2H2O, and Na4SiO4 in excess NaOH at 300C. If the excess NaOH is omitted a pre-cursor phase forms which on heating to 1200C yiels Nasicon. In its hydrated form Nasicon is hexagonal but on dehydration reverts to monoclinic. The triphosphate, NaZr2((PO4)3, is part of a solid solution system, Na1+4xZr2-x(PO4)3 with 1 > x > 0.12. This implies that the sodium zirconium silicophosphates may also exist in zirconium deficient form. 1981.