A-site deficient perovskites in the SrO-ZrO 2-Nb 2O 5 system: Composition dependent structures from neutron powder diffraction data

Siegbert Schmid; Ray L. Withers

doi:10.1016/j.jssc.2012.02.039

A-site deficient perovskites in the SrO-ZrO ₂-Nb ₂O ₅ system: Composition dependent structures from neutron powder diffraction data

Siegbert Schmid^*, Ray L. Withers

^*Corresponding author for this work

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

2 Citations (Scopus)

Abstract

A series of A-site deficient perovskite-type phases was synthesised and characterised in the SrO-ZrO ₂-Nb ₂O ₅ system. The composition range was established as Sr _0.70xZr _0.402xNb _0.60-2xO ₃, ∼0.02≤x≤0.30, and the resulting structures refined using high resolution neutron powder diffraction data. While structures in this composition range are closely related to the cubic perovskite parent, the symmetry for all investigated compositions is lowered to tetragonal or orthorhombic. For x<0.15 the resulting space group is tetragonal I4/mcm, for x>0.15 it is orthorhombic Pnma and for x=0.15 two phases co-exist, in space groups I4/mcm and Pnma. Crown

Original language	English
Pages (from-to)	63-70
Number of pages	8
Journal	Journal of Solid State Chemistry
Volume	191
DOIs	https://doi.org/10.1016/j.jssc.2012.02.039
Publication status	Published - Jul 2012

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title = "A-site deficient perovskites in the SrO-ZrO 2-Nb 2O 5 system: Composition dependent structures from neutron powder diffraction data",

abstract = "A series of A-site deficient perovskite-type phases was synthesised and characterised in the SrO-ZrO 2-Nb 2O 5 system. The composition range was established as Sr 0.70xZr 0.402xNb 0.60-2xO 3, ∼0.02≤x≤0.30, and the resulting structures refined using high resolution neutron powder diffraction data. While structures in this composition range are closely related to the cubic perovskite parent, the symmetry for all investigated compositions is lowered to tetragonal or orthorhombic. For x<0.15 the resulting space group is tetragonal I4/mcm, for x>0.15 it is orthorhombic Pnma and for x=0.15 two phases co-exist, in space groups I4/mcm and Pnma. Crown",

keywords = "Defect perovskite, Electron diffraction, Neutron diffraction, Powder diffraction",

author = "Siegbert Schmid and Withers, {Ray L.}",

year = "2012",

month = jul,

doi = "10.1016/j.jssc.2012.02.039",

language = "English",

volume = "191",

pages = "63--70",

journal = "Journal of Solid State Chemistry",

issn = "0022-4596",

publisher = "Academic Press Inc.",

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TY - JOUR

T1 - A-site deficient perovskites in the SrO-ZrO 2-Nb 2O 5 system

T2 - Composition dependent structures from neutron powder diffraction data

AU - Schmid, Siegbert

AU - Withers, Ray L.

PY - 2012/7

Y1 - 2012/7

N2 - A series of A-site deficient perovskite-type phases was synthesised and characterised in the SrO-ZrO 2-Nb 2O 5 system. The composition range was established as Sr 0.70xZr 0.402xNb 0.60-2xO 3, ∼0.02≤x≤0.30, and the resulting structures refined using high resolution neutron powder diffraction data. While structures in this composition range are closely related to the cubic perovskite parent, the symmetry for all investigated compositions is lowered to tetragonal or orthorhombic. For x<0.15 the resulting space group is tetragonal I4/mcm, for x>0.15 it is orthorhombic Pnma and for x=0.15 two phases co-exist, in space groups I4/mcm and Pnma. Crown

AB - A series of A-site deficient perovskite-type phases was synthesised and characterised in the SrO-ZrO 2-Nb 2O 5 system. The composition range was established as Sr 0.70xZr 0.402xNb 0.60-2xO 3, ∼0.02≤x≤0.30, and the resulting structures refined using high resolution neutron powder diffraction data. While structures in this composition range are closely related to the cubic perovskite parent, the symmetry for all investigated compositions is lowered to tetragonal or orthorhombic. For x<0.15 the resulting space group is tetragonal I4/mcm, for x>0.15 it is orthorhombic Pnma and for x=0.15 two phases co-exist, in space groups I4/mcm and Pnma. Crown

KW - Defect perovskite

KW - Electron diffraction

KW - Neutron diffraction

KW - Powder diffraction

UR - http://www.scopus.com/inward/record.url?scp=84862180500&partnerID=8YFLogxK

U2 - 10.1016/j.jssc.2012.02.039

DO - 10.1016/j.jssc.2012.02.039

M3 - Article

SN - 0022-4596

VL - 191

SP - 63

EP - 70

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

ER -

A-site deficient perovskites in the SrO-ZrO ₂-Nb ₂O ₅ system: Composition dependent structures from neutron powder diffraction data

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