1996
DOI: 10.1006/jssc.1996.0228
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Continuous Order–Disorder Transition in Li3Ni2NbO6and Cr-Doped Li3Ni2NbO6Rock Salt Structures

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Cited by 15 publications
(19 citation statements)
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“…Different metal ion substitutions at the M site led to further ordered superstructures such as Li 3 M 2 XO 6 (M = Mg, Co, Ni, Cu; X = Nb, Ta, Bi, Sb) and Na 3 M 2 XO 6 (M = Mg Co, Ni, Cu, Zn; X = Sb). [3][4][5][6][7][8][9][10][11] The superstructures crystallizing mostly in space groups P3 1 12, C2/m or C2/c arise from the additional ordering of the two M and one X ions, to form an ordered honeycomb array separated by interleaving Li + or Na + ions (figure 1). This particular arrangement of ions belong to the structure type named as O3 corresponding to the octahedral * For correspondence coordination (O) and the number of layers (3) found in the unit cell.…”
Section: Introductionmentioning
confidence: 99%
“…Different metal ion substitutions at the M site led to further ordered superstructures such as Li 3 M 2 XO 6 (M = Mg, Co, Ni, Cu; X = Nb, Ta, Bi, Sb) and Na 3 M 2 XO 6 (M = Mg Co, Ni, Cu, Zn; X = Sb). [3][4][5][6][7][8][9][10][11] The superstructures crystallizing mostly in space groups P3 1 12, C2/m or C2/c arise from the additional ordering of the two M and one X ions, to form an ordered honeycomb array separated by interleaving Li + or Na + ions (figure 1). This particular arrangement of ions belong to the structure type named as O3 corresponding to the octahedral * For correspondence coordination (O) and the number of layers (3) found in the unit cell.…”
Section: Introductionmentioning
confidence: 99%
“…The crystal structure of the sample LNNO55 is not the pure cation‐disordered rock‐salt phase due to some weak and unexpected peaks. According to the peaks of Fm‐3m and Fddd space group in the XRD pattern, LNNO55 is most likely inferred as a polymorphism containing cubic and orthorhombic phase 41 . However, all diffraction patterns of the other samples exhibited high crystallinity and cubic rock‐salt structure according to the sharp characteristic peaks that correspond to Fm‐3m space group.…”
Section: Resultsmentioning
confidence: 96%
“…Samples were slowly cooled (1°C/min) to room temperature. In addition, because of the order/disorder transition observed in Li Ni NbO [3], small portions of the sample were (a) quenched onto a brass plate from the reaction temperature or (b) annealed at 400°C in flowing oxygen. No differences in the structure and ordering of the quenched, annealed, and slowly cooled samples were observed.…”
Section: Methodsmentioning
confidence: 99%
“…Recently, a family of structures, Li M XO : M"Mg, Co, Ni; X"Nb, Ta, Sb, has been shown to exhibit partial cation order but with an unusual nonstatistical occupancy of the Li/M sites [1,2]: there are three sets of sites for the Li/M cations and the distribution over these sites is nonrandom and varies with the nature of M (and X). The partial cation order appears to be an equilibrium arrangement at low temperatures, although in the case of Li Ni NbO , the cation arrangement becomes increasingly statistical over the range 1100-1300°C, as the structure undergoes a continuous (partial) order-disorder transition [3].…”
Section: Introductionmentioning
confidence: 99%