Synthesis and Properties of Lanthanum Oxychlorotantalate

Lanthanum oxychlorotantalate is obtained by the solid-state reaction LaOCl + Ta2O5 = LaTa2O6Cl. The individuality of the compound obtained is confirmed by chemical, crystal-optical, and X-ray powder diffraction analyses. The lanthanum oxychlorotantalate synthesized is orthorhombic with the unit cell parameters a = 9.9012 Å, b = 7.4509 Å, and c = 8.4255 Å.