X-ray powder diffraction analysis of crystal structure of lanthanum orthovanadate

The crystal structure of lanthanum orthovanadate LaVO4 has been refined by the Rietveld refinement of powder X-ray data. The structure is monoclinic, space group P21/n (a non-standard setting of P21/c No. 14), with a = 7.0434(1) Å; b = 7.2801(1) Å; c = 6.7224(1) Å; β = 104.864(1)°, V = 332.51(9) Å3, Z = 4, Dx = 5.07 g cm− 3. The present results are in good agreement with the single-crystal X-ray diffraction results.