A structure and phase analysis investigation of the "1:1" ordered A2InNbO6 perovskites (A=Ca2+, Sr2+, Ba2+)

V. Ting; Y. Liu; R. L. Withers; L. Norén; M. James; J. D.Fitz Gerald

doi:10.1016/j.jssc.2005.11.012

A structure and phase analysis investigation of the "1:1" ordered A₂InNbO₆ perovskites (A=Ca²⁺, Sr²⁺, Ba²⁺)

V. Ting^*, Y. Liu, R. L. Withers, L. Norén, M. James, J. D.Fitz Gerald

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

Abstract

The structures of the Ba₂InNbO₆, Sr ₂InNbO₆ and Ca₂InNbO₆ "1:1" complex perovskites have been refined from neutron powder diffraction data. Both the A=Ca and Sr compounds occur at room temperature in P12₁/n1 (a=a_p+b_p, b=-a_p+b _p, c=2c_p) perovskite-related superstructures while the A=Ba compound occurs in the Fm3̄m, a=2a_p, elpasolite structure type. In the case of the A=Ca compound, an extensive Ca₂[(Ca _2x/3In_1-xNb _x/3)Nb]O₆ 'solid solution' field spanning compositions between Ca₄Nb₂O₉ and Ca ₂InNbO₆ in the CaO-InO_3/2-NbO_5/2 ternary phase diagram is shown to exist. Under the conditions of synthesis used, the 'solid solution' field stops just short of the ideal 1:1 Ca ₂InNbO₆ composition.

Original language	English
Pages (from-to)	551-562
Number of pages	12
Journal	Journal of Solid State Chemistry
Volume	179
Issue number	2
DOIs	https://doi.org/10.1016/j.jssc.2005.11.012
Publication status	Published - Feb 2006

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title = "A structure and phase analysis investigation of the {"}1:1{"} ordered A2InNbO6 perovskites (A=Ca2+, Sr2+, Ba2+)",

abstract = "The structures of the Ba2InNbO6, Sr 2InNbO6 and Ca2InNbO6 {"}1:1{"} complex perovskites have been refined from neutron powder diffraction data. Both the A=Ca and Sr compounds occur at room temperature in P121/n1 (a=ap+bp, b=-ap+b p, c=2cp) perovskite-related superstructures while the A=Ba compound occurs in the Fm{\=3}m, a=2ap, elpasolite structure type. In the case of the A=Ca compound, an extensive Ca2[(Ca 2x/3In1-xNb x/3)Nb]O6 'solid solution' field spanning compositions between Ca4Nb2O9 and Ca 2InNbO6 in the CaO-InO3/2-NbO5/2 ternary phase diagram is shown to exist. Under the conditions of synthesis used, the 'solid solution' field stops just short of the ideal 1:1 Ca 2InNbO6 composition.",

keywords = "Compositional solid solution, Neutron analysis, Perovskite",

author = "V. Ting and Y. Liu and Withers, {R. L.} and L. Nor{\'e}n and M. James and Gerald, {J. D.Fitz}",

year = "2006",

month = feb,

doi = "10.1016/j.jssc.2005.11.012",

language = "English",

volume = "179",

pages = "551--562",

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T1 - A structure and phase analysis investigation of the "1:1" ordered A2InNbO6 perovskites (A=Ca2+, Sr2+, Ba2+)

AU - Ting, V.

AU - Liu, Y.

AU - Withers, R. L.

AU - Norén, L.

AU - James, M.

AU - Gerald, J. D.Fitz

PY - 2006/2

Y1 - 2006/2

N2 - The structures of the Ba2InNbO6, Sr 2InNbO6 and Ca2InNbO6 "1:1" complex perovskites have been refined from neutron powder diffraction data. Both the A=Ca and Sr compounds occur at room temperature in P121/n1 (a=ap+bp, b=-ap+b p, c=2cp) perovskite-related superstructures while the A=Ba compound occurs in the Fm3̄m, a=2ap, elpasolite structure type. In the case of the A=Ca compound, an extensive Ca2[(Ca 2x/3In1-xNb x/3)Nb]O6 'solid solution' field spanning compositions between Ca4Nb2O9 and Ca 2InNbO6 in the CaO-InO3/2-NbO5/2 ternary phase diagram is shown to exist. Under the conditions of synthesis used, the 'solid solution' field stops just short of the ideal 1:1 Ca 2InNbO6 composition.

AB - The structures of the Ba2InNbO6, Sr 2InNbO6 and Ca2InNbO6 "1:1" complex perovskites have been refined from neutron powder diffraction data. Both the A=Ca and Sr compounds occur at room temperature in P121/n1 (a=ap+bp, b=-ap+b p, c=2cp) perovskite-related superstructures while the A=Ba compound occurs in the Fm3̄m, a=2ap, elpasolite structure type. In the case of the A=Ca compound, an extensive Ca2[(Ca 2x/3In1-xNb x/3)Nb]O6 'solid solution' field spanning compositions between Ca4Nb2O9 and Ca 2InNbO6 in the CaO-InO3/2-NbO5/2 ternary phase diagram is shown to exist. Under the conditions of synthesis used, the 'solid solution' field stops just short of the ideal 1:1 Ca 2InNbO6 composition.

KW - Compositional solid solution

KW - Neutron analysis

KW - Perovskite

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DO - 10.1016/j.jssc.2005.11.012

M3 - Article

SN - 0022-4596

VL - 179

SP - 551

EP - 562

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

IS - 2

ER -

A structure and phase analysis investigation of the "1:1" ordered A₂InNbO₆ perovskites (A=Ca²⁺, Sr²⁺, Ba²⁺)

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