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Crystallographic shear relations between the structure types -UO3, CaF2, La2O3 and NaCl and a correlation of some lanthanide and actinide oxide structures

Crystallographic shear relations between the structure types -UO3, CaF2, La2O3 and NaCl and a... When the -UO3, La2O3 and NaCl structure types are idealized by a topological distortion involving only an extension or contraction of the hexagonal c axis (cubic 111) it is clear that they are related to each other, and to the CaF2 type, by crystallographic shear. A number of lanthanide and actinide oxide structures are of these types, or derived superstructure types containing ordered anion `vacancies' or `interstitial' anions. The structural relations suggest possible reduction mechanisms. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Acta Crystallographica Section A: Crystal Physics, Diffraction, Theoretical and General Crystallography International Union of Crystallography

Crystallographic shear relations between the structure types -UO3, CaF2, La2O3 and NaCl and a correlation of some lanthanide and actinide oxide structures

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Crystallographic shear relations between the structure types -UO3, CaF2, La2O3 and NaCl and a correlation of some lanthanide and actinide oxide structures

Hyde, B.G
Acta Crystallographica Section A: Crystal Physics, Diffraction, Theoretical and General Crystallography , Volume 27 (6): 617 – Nov 1, 1971

Abstract

When the -UO3, La2O3 and NaCl structure types are idealized by a topological distortion involving only an extension or contraction of the hexagonal c axis (cubic 111) it is clear that they are related to each other, and to the CaF2 type, by crystallographic shear. A number of lanthanide and actinide oxide structures are of these types, or derived superstructure types containing ordered anion `vacancies' or `interstitial' anions. The structural relations suggest possible reduction mechanisms.

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Publisher
International Union of Crystallography
Copyright
Copyright (c) 1971 International Union of Crystallography
ISSN
0567-7394
DOI
10.1107/S0567739471001359
Publisher site
See Article on Publisher Site

Abstract

When the -UO3, La2O3 and NaCl structure types are idealized by a topological distortion involving only an extension or contraction of the hexagonal c axis (cubic 111) it is clear that they are related to each other, and to the CaF2 type, by crystallographic shear. A number of lanthanide and actinide oxide structures are of these types, or derived superstructure types containing ordered anion `vacancies' or `interstitial' anions. The structural relations suggest possible reduction mechanisms.

Journal

Acta Crystallographica Section A: Crystal Physics, Diffraction, Theoretical and General Crystallography – International Union of Crystallography

Published: Nov 1, 1971

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