Published April 1992
| Version v1
Journal article
A TEM study of the ordering of excess interstitial oxygen atoms in Ln2NiO4+δ(Ln = La, Nd)
- 1. Univ. Complutense de Madrid (Spain)
- 2. Australian National Univ., Canberra (Australia)
Description
A Transmission Electron Microscope (TEM) study of the oxygen excess Ln2NiO4+δ (Ln = La, Nd) compounds shows long range ordering of interstitial oxygen, characterized by weak superlattice reflections whose modulation wave-vector can be both commensurate as well as incommensurate with respect to the reciprocal lattice of the basic K2NiF4 structure type for both oxides. The excess interstitial oxygen atoms are sometimes found to be rather mobile and susceptible to electron beam irradiation, although less so in the case of the Nd compound. A new type of superstructure has been found in the Nd case, and a model for the oxygen interstitial ordering is given
Additional details
Publishing Information
- Journal Title
- Journal of Solid State Chemistry
- Journal Volume
- 97
- Journal Issue
- 2
- Journal Page Range
- p. 443-451.
- ISSN
- 0022-4596
- CODEN
- JSSCBI
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 24022028
- Subject category
- S36: MATERIALS SCIENCE;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- CRYSTAL STRUCTURE; EXPERIMENTAL DATA; LANTHANUM OXIDES; MILLER INDICES; NEODYMIUM OXIDES; NICKEL OXIDES; TRANSMISSION ELECTRON MICROSCO; X-RAY DIFFRACTION
- Descriptors DEC
- CHALCOGENIDES; COHERENT SCATTERING; DATA; DIFFRACTION; ELECTRON MICROSCOPY; INFORMATION; LANTHANUM COMPOUNDS; MICROSCOPY; NEODYMIUM COMPOUNDS; NICKEL COMPOUNDS; NUMERICAL DATA; OXIDES; OXYGEN COMPOUNDS; RARE EARTH COMPOUNDS; SCATTERING; TRANSITION ELEMENT COMPOUNDS