Synthesis and Characterization of Ba2VO4 with the β-Ca2SiO4 Structure: Comparison with Sr2VO4

Phase-pure Ba2VO4 has been synthesized by hydrogen reduction of a mixture of Ba3V2O8 and 20% excess BaCO3 at 1200-1250°C, and its crystal structure, designated as β-Ba2VO4, refined using a combination of powder neutron and X-ray diffraction data. It is monoclinic, space group P 21/n (no. 14), with a = 6.0191(7) Å b = 7.6494(7), c = 10.465(1), β = 92.39(1)°, and V = 481.4(2) Å3 from Guinier X-ray diffraction data. β-Ba2VO4 is isostructural with …