X-Ray Diffraction Refinement of the Calcium Tungstate Structure

The crystal structure of CaWO4 (scheelite) has been refined with single-crystal x-ray diffraction data. For the tetragonal cell a=5.243±0.002, c=11.376±0.003 Å. Oxygen coordinates 0.1504, 0.0085, and 0.2111 correspond to Ca–O distances 2.44 and 2.48 Å and W–O distances 1.78 Å.