THE CRYSTAL-STRUCTURE OF PBS2O3

The crystal structure of lead thiosulfate, PbS2O3, was solved from X-ray and neutron diffraction data. The unit cell was obtained by indexing Guinier film data. The positions of the lead atoms were found by direct methods from single crystal X-ray diffraction data, while the positions of the atoms of the thiosulfate ion were derived from neutron powder diffraction data. The structure was refined by profile analysis of neutron powder diffraction data, and the validity of the structure was tested by profile analysis of synchrotron X-ray powder diffraction data. The structure was solved and refined in the orthorhombic space group Pbca (No. 61) with the lattice parameters a = 7.1802(3), b = 6.9199(3), c = 16.1156(8) angstrom and Z = 8. The lead atom in the structure is coordinated by six oxygen atoms and three sulfur atoms.