BaBiO2.5, a new bismuth oxide with a layered structure

P. Lightfoot; J. A. Hriljac; Shiyou Pei; Ying Zheng; A. W. Mitchell; D. R. Richards; B. Dabrowski; J. D. Jorgensen; D. G. Hinks

doi:10.1016/0022-4596(91)90353-J

BaBiO_2.5, a new bismuth oxide with a layered structure

P. Lightfoot^*, J. A. Hriljac, Shiyou Pei, Ying Zheng, A. W. Mitchell, D. R. Richards, B. Dabrowski, J. D. Jorgensen, D. G. Hinks

^*Corresponding author for this work

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

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Abstract

A new Bi(III) oxide, BaBiO_2.5, has been prepared by slow-cooling of the perovskite-like BaBiO₃ in a reducing atmosphere. The structure was solved ab initio from a combination of synchrotron X-ray and pulsed neutron powder diffraction data. The phase crystallizes in the monoclinic space group P2₁/c, with a = 7.3412(1) Å, b = 7.5793(1) Å, c = 6.0722(1) Å, and β = 99.187(2)°. A novel layer-type structure is adopted consisting of double BiO_x sheets in the bc plane separated by Ba ions along the a direction. Bi is four-coordinated in a pseudotrigonal bipyramidal environment, with the electron lone-pair occupying one of the equatorial sites, similar to that found in β-Bi₂O₃. There are, thus, significant differences from either the Aurivillius phases or the high-T_c bismuth cuprate superconductors, which may also be regarded as layered bismuth oxides.

Original language	English
Pages (from-to)	473-479
Number of pages	7
Journal	Journal of Solid State Chemistry
Volume	92
Issue number	2
DOIs	https://doi.org/10.1016/0022-4596(91)90353-J
Publication status	Published - 1 Jan 1991

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@article{a47bd8d3d42f4d0aa8173ece85ca783f,

title = "BaBiO2.5, a new bismuth oxide with a layered structure",

abstract = "A new Bi(III) oxide, BaBiO2.5, has been prepared by slow-cooling of the perovskite-like BaBiO3 in a reducing atmosphere. The structure was solved ab initio from a combination of synchrotron X-ray and pulsed neutron powder diffraction data. The phase crystallizes in the monoclinic space group P21/c, with a = 7.3412(1) {\AA}, b = 7.5793(1) {\AA}, c = 6.0722(1) {\AA}, and β = 99.187(2)°. A novel layer-type structure is adopted consisting of double BiOx sheets in the bc plane separated by Ba ions along the a direction. Bi is four-coordinated in a pseudotrigonal bipyramidal environment, with the electron lone-pair occupying one of the equatorial sites, similar to that found in β-Bi2O3. There are, thus, significant differences from either the Aurivillius phases or the high-Tc bismuth cuprate superconductors, which may also be regarded as layered bismuth oxides.",

author = "P. Lightfoot and Hriljac, {J. A.} and Shiyou Pei and Ying Zheng and Mitchell, {A. W.} and Richards, {D. R.} and B. Dabrowski and Jorgensen, {J. D.} and Hinks, {D. G.}",

year = "1991",

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doi = "10.1016/0022-4596(91)90353-J",

language = "English",

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T1 - BaBiO2.5, a new bismuth oxide with a layered structure

AU - Lightfoot, P.

AU - Hriljac, J. A.

AU - Pei, Shiyou

AU - Zheng, Ying

AU - Mitchell, A. W.

AU - Richards, D. R.

AU - Dabrowski, B.

AU - Jorgensen, J. D.

AU - Hinks, D. G.

PY - 1991/1/1

Y1 - 1991/1/1

N2 - A new Bi(III) oxide, BaBiO2.5, has been prepared by slow-cooling of the perovskite-like BaBiO3 in a reducing atmosphere. The structure was solved ab initio from a combination of synchrotron X-ray and pulsed neutron powder diffraction data. The phase crystallizes in the monoclinic space group P21/c, with a = 7.3412(1) Å, b = 7.5793(1) Å, c = 6.0722(1) Å, and β = 99.187(2)°. A novel layer-type structure is adopted consisting of double BiOx sheets in the bc plane separated by Ba ions along the a direction. Bi is four-coordinated in a pseudotrigonal bipyramidal environment, with the electron lone-pair occupying one of the equatorial sites, similar to that found in β-Bi2O3. There are, thus, significant differences from either the Aurivillius phases or the high-Tc bismuth cuprate superconductors, which may also be regarded as layered bismuth oxides.

AB - A new Bi(III) oxide, BaBiO2.5, has been prepared by slow-cooling of the perovskite-like BaBiO3 in a reducing atmosphere. The structure was solved ab initio from a combination of synchrotron X-ray and pulsed neutron powder diffraction data. The phase crystallizes in the monoclinic space group P21/c, with a = 7.3412(1) Å, b = 7.5793(1) Å, c = 6.0722(1) Å, and β = 99.187(2)°. A novel layer-type structure is adopted consisting of double BiOx sheets in the bc plane separated by Ba ions along the a direction. Bi is four-coordinated in a pseudotrigonal bipyramidal environment, with the electron lone-pair occupying one of the equatorial sites, similar to that found in β-Bi2O3. There are, thus, significant differences from either the Aurivillius phases or the high-Tc bismuth cuprate superconductors, which may also be regarded as layered bismuth oxides.

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DO - 10.1016/0022-4596(91)90353-J

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SP - 473

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JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

IS - 2

ER -

BaBiO_2.5, a new bismuth oxide with a layered structure

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