Poster: Neutron Scattering on KOs2O6 powder
Authors: Götz Schuck, Janusz Karpinski, Zbigniew BukowskiConference: 2008 Swiss Physical Society - MaNEP meeting, Genève, March 26-27, 2008
The HRPT data, measured between 2 K and 290 K, was refined with the Rietveld program FullProf, based on detailed crystallographic data at room temperature. As a result of the refinement, we received lattice constants, structural parameters and fraction values for the present phases (β-pyrochlore KOs2O6 and precipitation phases).
The HRPT measurement was carried out on powder that beside β-pyrochlore KOs2O6 (fraction 33.08 %) also contain three parasitic phases (KOs2O4 fraction 26.14 %; OsO2 fraction 37.14 % and Os fraction 3.64 %).
Do to the chosen synthesis path it is not possible to produce polycrystalline β-pyrochlore KOs2O6 without precipitations because washing and etching is not possible. In contrast to β-pyrochlore RbOs2O6 were it is possible to remove precipitations. This is probably the reason why we are the first group that measured polycrystalline β-pyrochlore KOs2O6 with neutron diffraction.