Natural wulfenite: structural refinement by single crystal X-ray diffraction

The structure of a wulfenite (PbMoO4) from Monte Cengio (Vicenza, Italy) was refined by single-crystal X-ray examination. The anisotropic structural refinement was carried out in the tetragonal space group 141/a, unit cell parameters a = 5.434(1), c = 12.107(1) Å, V = 357.5 Å3, Z = 4, obtaining an agreement factor of 0.015. The bond distances and the mean electron counts indicate a whole occupancy of Mo in the tetrahedral sites and of Pb in the eight-coordinated ones.