Crystallographic Studies of Ba12Nb8-xTaxCo4O36 (x=1,3,4,5,7)

W. Wong-Ng; G. Liu; I. Levin; I. Williamson; A. Correa Hernandez; J. A. Kaduk; L. Li

doi:10.1016/j.solidstatesciences.2017.06.012

Crystallographic Studies of Ba₁₂Nb_8-xTa_xCo₄O₃₆ (x=1,3,4,5,7)

W. Wong-Ng, G. Liu, I. Levin, I. Williamson, A. Correa Hernandez, J. A. Kaduk, L. Li

Micron School of Materials Science and Engineering

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

Abstract

Crystal structures and X-ray reference powder diffraction patterns have been determined for the Ba₁₂Nb_8-xTa_xCo₄O₃₆ (x = 1, 3, 4, 5, 7) series. Ba₁₂Nb_8-xTa_xCo₄O₃₆ crystallize in the cubic perovskite structure with a space group Pm3¯ m (No. 221) and the lattice parameter increasing from a = 4.08732(3) Å to a = 4.08894 (2) Å as x varies from 1 to 7. The Goldschmidt distortion parameter for the entire series is about 1.05 (1.0488–1.0506), being similar to that of the cubic end member Ba₃Nb₂CoO₉. Transmission electron microscopy of the composition Ba₁₂Nb₄Ta₄Co₄O₃₆ (or Ba₃(NbTaCo)O₉) revealed nanoscale 1:2 ordering of Nb/Ta and Co, manifested in the presence of the diffuse superlattice reflections. As this ordering is limited to short range, the average structures were still refined assuming the ideal-perovskite cubic symmetry. X-ray powder diffraction patterns of the studied compounds have been submitted to the Powder Diffraction File (PDF).

Original language	American English
Pages (from-to)	3-7
Number of pages	5
Journal	Solid State Sciences
Volume	71
DOIs	https://doi.org/10.1016/j.solidstatesciences.2017.06.012
State	Published - Sep 2017

Keywords

BaNbTaCoO
Crystal structure
Powder diffraction file (PDF)
Short-range 1:2 ordering
TEM studies
X-ray diffraction patterns

EGS Disciplines

Materials Science and Engineering

Access to Document

10.1016/j.solidstatesciences.2017.06.012

Cite this

@article{fb2d92bc0411422db9ffaf690819d9b0,

title = "Crystallographic Studies of Ba12Nb8-xTaxCo4O36 (x=1,3,4,5,7)",

abstract = "Crystal structures and X-ray reference powder diffraction patterns have been determined for the Ba12Nb8-xTaxCo4O36 (x = 1, 3, 4, 5, 7) series. Ba12Nb8-xTaxCo4O36 crystallize in the cubic perovskite structure with a space group Pm3¯ m (No. 221) and the lattice parameter increasing from a = 4.08732(3) {\AA} to a = 4.08894 (2) {\AA} as x varies from 1 to 7. The Goldschmidt distortion parameter for the entire series is about 1.05 (1.0488–1.0506), being similar to that of the cubic end member Ba3Nb2CoO9. Transmission electron microscopy of the composition Ba12Nb4Ta4Co4O36 (or Ba3(NbTaCo)O9) revealed nanoscale 1:2 ordering of Nb/Ta and Co, manifested in the presence of the diffuse superlattice reflections. As this ordering is limited to short range, the average structures were still refined assuming the ideal-perovskite cubic symmetry. X-ray powder diffraction patterns of the studied compounds have been submitted to the Powder Diffraction File (PDF).",

keywords = "BaNbTaCoO, Crystal structure, Powder diffraction file (PDF), Short-range 1:2 ordering, TEM studies, X-ray diffraction patterns",

author = "W. Wong-Ng and G. Liu and I. Levin and I. Williamson and \{Correa Hernandez\}, A. and Kaduk, \{J. A.\} and L. Li",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier Masson SAS",

year = "2017",

month = sep,

doi = "10.1016/j.solidstatesciences.2017.06.012",

language = "American English",

volume = "71",

pages = "3--7",

}

TY - JOUR

T1 - Crystallographic Studies of Ba12Nb8-xTaxCo4O36 (x=1,3,4,5,7)

AU - Wong-Ng, W.

AU - Liu, G.

AU - Levin, I.

AU - Williamson, I.

AU - Correa Hernandez, A.

AU - Kaduk, J. A.

AU - Li, L.

PY - 2017/9

Y1 - 2017/9

N2 - Crystal structures and X-ray reference powder diffraction patterns have been determined for the Ba12Nb8-xTaxCo4O36 (x = 1, 3, 4, 5, 7) series. Ba12Nb8-xTaxCo4O36 crystallize in the cubic perovskite structure with a space group Pm3¯ m (No. 221) and the lattice parameter increasing from a = 4.08732(3) Å to a = 4.08894 (2) Å as x varies from 1 to 7. The Goldschmidt distortion parameter for the entire series is about 1.05 (1.0488–1.0506), being similar to that of the cubic end member Ba3Nb2CoO9. Transmission electron microscopy of the composition Ba12Nb4Ta4Co4O36 (or Ba3(NbTaCo)O9) revealed nanoscale 1:2 ordering of Nb/Ta and Co, manifested in the presence of the diffuse superlattice reflections. As this ordering is limited to short range, the average structures were still refined assuming the ideal-perovskite cubic symmetry. X-ray powder diffraction patterns of the studied compounds have been submitted to the Powder Diffraction File (PDF).

AB - Crystal structures and X-ray reference powder diffraction patterns have been determined for the Ba12Nb8-xTaxCo4O36 (x = 1, 3, 4, 5, 7) series. Ba12Nb8-xTaxCo4O36 crystallize in the cubic perovskite structure with a space group Pm3¯ m (No. 221) and the lattice parameter increasing from a = 4.08732(3) Å to a = 4.08894 (2) Å as x varies from 1 to 7. The Goldschmidt distortion parameter for the entire series is about 1.05 (1.0488–1.0506), being similar to that of the cubic end member Ba3Nb2CoO9. Transmission electron microscopy of the composition Ba12Nb4Ta4Co4O36 (or Ba3(NbTaCo)O9) revealed nanoscale 1:2 ordering of Nb/Ta and Co, manifested in the presence of the diffuse superlattice reflections. As this ordering is limited to short range, the average structures were still refined assuming the ideal-perovskite cubic symmetry. X-ray powder diffraction patterns of the studied compounds have been submitted to the Powder Diffraction File (PDF).

KW - BaNbTaCoO

KW - Crystal structure

KW - Powder diffraction file (PDF)

KW - Short-range 1:2 ordering

KW - TEM studies

KW - X-ray diffraction patterns

UR - https://www.scopus.com/pages/publications/85021718982

UR - https://scholarworks.boisestate.edu/mse_facpubs/329

U2 - 10.1016/j.solidstatesciences.2017.06.012

DO - 10.1016/j.solidstatesciences.2017.06.012

M3 - Article

SN - 1293-2558

VL - 71

SP - 3

EP - 7

JO - Solid State Sciences

JF - Solid State Sciences

ER -