Published July 1, 1979 | Version v1
Journal article Metadata-only

Lattice shear distortions in fluorite structure oxides

Creators

  • 1. Argonne National Laboratory, Argonne, Illinois 60439

Description

Crystallographic shear distortions have been observed in fluorite structure, single crystals of UO2 And Zr(Ca)O/sub 2-x/ by neutron-diffraction techniques. These distortions localize on the oxygen sublattice and do not require the presence of an external strain. The internal rearrangement mode in UO2 is a transverse, zone boundary q=2π/a (0.5, 0,0) deformation with amplitude 0.014 A. In Zr(Ca)O/sub 2-x/, the mode is a longitudinal, q=2π/a (0,0,0.5) deformation with amplitude 0.23 A. Cation-anion elastic interaction dominate in selecting the nature of the internal distortion

Additional details

Publishing Information

Journal Title
AIP (Am. Inst. Phys.) Conf. Proc.
Journal Volume
53
Journal Issue
1
Series
AIP (Am. Inst. Phys.) Conf. Proc.
Journal Page Range
376-378
ISSN
0094-243X

Conference

Title
International conference on modulated structures.
Dates
22 - 25 Mar 1979.
Place
Kailua-Kona, HI, USA.

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
11513395
Subject category
S36: MATERIALS SCIENCE;
Resource subtype / Literary indicator
Conference
Descriptors DEI
CALCIUM OXIDES; CHEMICAL COMPOSITION; CRYSTAL STRUCTURE; DISLOCATIONS; DOMAIN STRUCTURE; NEUTRON DIFFRACTION; ORDER-DISORDER TRANSFORMATIONS; SHEAR PROPERTIES; URANIUM OXIDES; ZIRCONIUM OXIDES
Descriptors DEC
ACTINIDE COMPOUNDS; ALKALINE EARTH METAL COMPOUNDS; CALCIUM COMPOUNDS; CHALCOGENIDES; COHERENT SCATTERING; CRYSTAL DEFECTS; DIFFRACTION; LINE DEFECTS; MECHANICAL PROPERTIES; OXIDES; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; SCATTERING; TRANSITION ELEMENT COMPOUNDS; URANIUM COMPOUNDS; ZIRCONIUM COMPOUNDS

Optional Information

Secondary number(s)
CONF-790341--.