Exploring order-disorder structural transitions in the Li-Nb-N-O system: The new antifluorite oxynitride Li11NbN4O2 |
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| Authors: | J. Cabana M. Casas-Cabanas A. Fuertes |
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| Affiliation: | a Institut de Ciència de Materials de Barcelona (CSIC), Campus UAB, E-08193 Bellaterra, Catalonia, Spain
b Laboratoire CRISMAT, UMR 6508 CNRS ENSICAEN, 6 bd Maréchal Juin, 14050 CAEN, France |
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| Abstract: | A systematic exploratory study of the Li-Nb-N-O system at low oxygen and high lithium contents has been performed. As lithium and oxygen increase, an order-disorder transition has been identified using powder neutron diffraction data between Li16Nb2N8O, which crystallizes in an antifluorite-type superstructure with cationic and anionic ordering, and Li11NbN4O2, a new antifluorite-type oxynitride that shows structural disorder. A description of the synthetic conditions required to prepare these phases and their structural characterization is presented. |
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| Keywords: | Lithium niobium oxynitride Neutron diffraction Synthesis Order-disorder |
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