Discriminate the crystallographic sites of lithium and sodium in honeycomb-ordered layered (Li1-xNax)3Ni2SbO6
This proposal aims in determining the crystallographic structure of a new honeycomb-ordered layered phase obtained by the high-temperature combination of Li3Ni2SbO6 and Na3Ni2SbO6. Neutron powder diffraction would help in choosing between three possible crystallographic structures according to the location of lithium and sodium ions: in-plane mixed occupancy, in-plane ordering, or out-of-plane ordering. In all cases, the structure would be unusual, bringing significant input for understanding the structure alkali transition metal layered oxides and for searching new compositions with unusual cationic ordering. The use of neutrons is required as the contrast it offers complementary with X-Ray will enable the precise localisation of Li, Na, Ni and Sb atoms within the octahedral sites of the structure.
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Berthelot; ROUSSE Gwenaelle and SUARD Emmanuelle. (2019). Discriminate the crystallographic sites of lithium and sodium in honeycomb-ordered layered (Li1-xNax)3Ni2SbO6. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-21-1121
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