Crystal structure of Na2HfSi2O7 by Rietveld refinement

Abstract : The structure of triclinic disodium hafnium disilicate, Na 2 HfSi 2 O 7 , has been determined by laboratory powder X-ray diffraction and refined by the Rietveld refinement. The structure is a framework made of alternate layers of HfO 6 octahedra and SiO 4 tetrahedra linked by common O atoms. Sodium atoms are located in the voids of the framework, aligned into tunnels along the [010] direction. Na 2 HfSi 2 O 7 is isostructural with the parakeldyshite Na 2 ZrSi 2 O 7 phase.
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Nicolas Massoni, Pierrick Chevreux. Crystal structure of Na2HfSi2O7 by Rietveld refinement. Acta Crystallographica Section E: Structure Reports Online, International Union of Crystallography, 2016, 72, pp.1434. ⟨10.1107/S2056989016014225⟩. ⟨cea-01368805⟩

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