# Neutron diffraction determination of the cell dimensions and thermal expansion of the fluoroperovskite KMgF3 from 293 to 3.6 K

Download Get@NRC: Neutron diffraction determination of the cell dimensions and thermal expansion of the fluoroperovskite KMgF3 from 293 to 3.6 K (Opens in a new window) Resolve DOI: http://doi.org/10.1007/s00269-006-0106-x Search for: Mitchell, Roger; Search for: Cranswick, Lachlan; Search for: Swainson, Ian Article Physics and Chemistry of Minerals 33 8 587–591; # of pages: 5 The cell dimensions of the fluoroperovskite KMgF3 synthesized by solid state methods have been determined by powder neutron diffraction and Rietveld refinement over the temperature range 293–3.6 K using Pt metal as an internal standard for calibration of the neutron wavelength. These data demonstrate conclusively that cubic $$Pm\overline{3} m$$ KMgF3 does not undergo any phase transitions to structures of lower symmetry with decreasing temperature. Cell dimensions range from 3.9924(2) at 293 K to 3.9800(2) at 3.6 K, and are essentially constant within experimental error from 50 to 3.6 K. The thermal expansion data are described using a fourth order polynomial function. 2006-11-22 National Research Council Canada; NRC Canadian Neutron Beam Centre No 12337925 Export as RIS Report a correction b364cb88-d0ad-444b-9bfd-ef71401f474d 2009-09-10 2016-05-09