ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 43, Number 5
JKCSEZ 43(5)
October 20, 1999 

The phase change upon Bi substitutions in Ca1.5-1.5xBixVO4 has been systematically studied. The x value corresponding to the maximum Bi substitutions reades to 0.14 and in this range(x≤0.14), the single phasic Ca3(VO4)2 can be identified. However, a new phase of BiV1.025O4+x is apparently formed along with the Ca3(VO4)2 phase, when the x value exceeds beyond 0.18 (x≥0.18). As a result of Bi substitution in the range of x≤0.14, the interplanar space(d300) becomes larger as the Bi content increases. Since the composition of single phasic Ca129Bi0.14VO4 (x=O.14) is, however, incongruent melting one, no definite melting point could be observed. But we found that its solidus temperature was 1182℃ by DTA analysis.