The structure of a single crystal, grown by a slow cooling a melt of Ca 1.29 Bi 0.14 VO 4 composition, was analyzed.
The crystals belong to the rhombohedral space group R3c and the dimensions of the unit cells are a = 10.848(1) Å, c = 38.048(6) Å, V...
The structure of a single crystal, grown by a slow cooling a melt of Ca 1.29 Bi 0.14 VO 4 composition, was analyzed.
The crystals belong to the rhombohedral space group R3c and the dimensions of the unit cells are a = 10.848(1) Å, c = 38.048(6) Å, V = 3877.6(8) Å 3 for the pale yellow crystal, and a = 10.857(1) Å, c = 38.063(6) Å, V = 3885.6(8) Å 3 for the yellow crystal, respectively. Unit cell dimensions of the crystal were larger than those of the host crystal, Ca 3 (VO 4 ) 2 , owing to the Bi that replaced Ca in the unit cell. Ca in the unit cell formed six, eight and nine coordinated polyhedra with O atoms and Bi replacing Ca entered the eight or nine coordinated Ca sites with different crystallographic environments in the unit cell. All the V in the unit cell formed four coordinated tetrahedra with O atoms, however V-O bond lengths in the tetrahedra were different from one another.