Determination of complex structures by combined neutron and synchrotron X-ray powder diffraction

Synchrotron X-ray and neutron powder diffraction were used together to ascertain the crystal structure of Ga2(HPO3)3.4H2O, which has 29 atoms in the asymmetric unit cell and 117 structural parameters. Using these two methods to complement each other overcomes the disparity between powder data and Rietveld profile data that had previously impeded determining crystal structure from powder diffraction.