José Antonio Alonso, Sergio Mayer
KSbTeO6 defect pyrochlore has been prepared from K2C2O4, Sb2O3, and 15% excess TeO2 by solid-state reaction at 850 ◦C. Direct methods implemented in the software EXPO2013 allowed establishing the basic structural framework. This was followed by a combined Rietveld refinement from X-ray powder diffraction (XRD) and neutron powder diffraction (NPD) data, which unveiled additional structural features. KSbTeO6 is cubic, a = 10.1226(7) Å, space group Fd3m, Z = 8 and it is made of a mainly covalent framework of corner-sharing (Sb,Te)O6 octahedra, with weakly bonded K+ ions located within large cages. The large K-O distances, 3.05(3)–3.07(3) Å, and quite large anisotropic atomic displacement parameters account for the easiness of K+ exchange for other cations of technological importance.
@article{7c9e4638-6a80-46ab-a9a8-1080694c16f9,
title={Potassium Disorder in the Defect Pyrochlore KSbTeO6: A Neutron Diffraction Study},
author={José Antonio Alonso and Sergio Mayer},
year={2017},
language={es}
}TY - JOUR TI - Potassium Disorder in the Defect Pyrochlore KSbTeO6: A Neutron Diffraction Study AU - José Antonio Alonso AU - Sergio Mayer PY - 2017 LA - es ER -
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