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Microdomains, Solid Solutions and the "Defect Fluorite" to C-Type Sesquioxide Transition in CeO2-RO1.5 and ZrO2-RO1.5 Systems

Withers, RL ; Thompson, JG ; Gabbitas, N ; Wallenberg, LR LU and Welberry, TR (1995) In Journal of Solid State Chemistry 120(2). p.290-298
Abstract
Satellite dark field (SDF) imaging is used to show that there is a definite change in symmetry on moving across the two-phase region separating the so-called "defect fluorite" and C-type sesquioxide solid solution regions in (1 - x)CeO2 · xRO1.5 and (1 - x )ZrO2 · xRO1.5 systems. SDF images of the "defect fluorite" side of the two-phase region are characterized by a microdomain texture on the ∼100-200 Å scale and the local symmetry within any one of these microdomains is shown to be lower than cubic. Corresponding SDF images of the C-type sesquioxide side of the two-phase region are by contrast homogeneous and consistent with Ia3 space group symmetry. The nature of the local oxygen vacancy distribution on either side of the two-phase... (More)
Satellite dark field (SDF) imaging is used to show that there is a definite change in symmetry on moving across the two-phase region separating the so-called "defect fluorite" and C-type sesquioxide solid solution regions in (1 - x)CeO2 · xRO1.5 and (1 - x )ZrO2 · xRO1.5 systems. SDF images of the "defect fluorite" side of the two-phase region are characterized by a microdomain texture on the ∼100-200 Å scale and the local symmetry within any one of these microdomains is shown to be lower than cubic. Corresponding SDF images of the C-type sesquioxide side of the two-phase region are by contrast homogeneous and consistent with Ia3 space group symmetry. The nature of the local oxygen vacancy distribution on either side of the two-phase region is discussed and a possible model for the "defect fluorite" side of the two-phase region proposed. (Less)
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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Solid State Chemistry
volume
120
issue
2
pages
9 pages
publisher
Academic Press
external identifiers
  • scopus:0000212095
ISSN
0022-4596
DOI
10.1006/jssc.1995.1411
language
English
LU publication?
yes
id
6b592a37-d786-4e42-aa1f-1af1ab222664
date added to LUP
2023-10-31 15:48:11
date last changed
2025-04-04 15:04:09
@article{6b592a37-d786-4e42-aa1f-1af1ab222664,
  abstract     = {{Satellite dark field (SDF) imaging is used to show that there is a definite change in symmetry on moving across the two-phase region separating the so-called "defect fluorite" and C-type sesquioxide solid solution regions in (1 - x)CeO2 · xRO1.5 and (1 - x )ZrO2 · xRO1.5 systems. SDF images of the "defect fluorite" side of the two-phase region are characterized by a microdomain texture on the ∼100-200 Å scale and the local symmetry within any one of these microdomains is shown to be lower than cubic. Corresponding SDF images of the C-type sesquioxide side of the two-phase region are by contrast homogeneous and consistent with Ia3 space group symmetry. The nature of the local oxygen vacancy distribution on either side of the two-phase region is discussed and a possible model for the "defect fluorite" side of the two-phase region proposed.}},
  author       = {{Withers, RL and Thompson, JG and Gabbitas, N and Wallenberg, LR and Welberry, TR}},
  issn         = {{0022-4596}},
  language     = {{eng}},
  month        = {{12}},
  number       = {{2}},
  pages        = {{290--298}},
  publisher    = {{Academic Press}},
  series       = {{Journal of Solid State Chemistry}},
  title        = {{Microdomains, Solid Solutions and the "Defect Fluorite" to C-Type Sesquioxide Transition in CeO2-RO1.5 and ZrO2-RO1.5 Systems}},
  url          = {{http://dx.doi.org/10.1006/jssc.1995.1411}},
  doi          = {{10.1006/jssc.1995.1411}},
  volume       = {{120}},
  year         = {{1995}},
}