Negative Thermal Expansion in ZrW{sub 2}O{sub 8}: Mechanisms, Rigid Unit Modes, and Neutron Total Scattering
Journal Article
·
· Physical Review Letters
- Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ (United Kingdom)
- Physics Department, Oxford University, Clarendon Laboratory, Parks Road, Oxford OX1 3PU (United Kingdom)
- Biological Physics, Bateman Physical Sciences Building, Arizona State University, Tempe, Arizona 85287-1504 (United States)
- Department of Chemistry, University Science Laboratories, South Road, Durham DH1 3LE (United Kingdom)
The local structure of the low-temperature ordered phase of the negative thermal expansion (NTE) material ZrW{sub 2}O{sub 8} has been investigated by reverse Monte Carlo (RMC) modeling of neutron total scattering data. We obtain, for the first time, quantitative measurements of the extent to which the WO{sub 4} and ZrO{sub 6} polyhedra move as rigid units, and we show that these values are consistent with the predictions of rigid unit mode theory. We suggest that rigid unit modes are associated with the NTE. Our results do not support a recent interpretation of x-ray-absorption fine structure spectroscopy data in terms of a larger rigid structural component involving the Zr-O-W linkage.
- OSTI ID:
- 20699709
- Journal Information:
- Physical Review Letters, Vol. 95, Issue 25; Other Information: DOI: 10.1103/PhysRevLett.95.255501; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
Similar Records
Negative thermal expansion in ZrW{sub 2}O{sub 8} and HfW{sub 2}O{sub 8}
Study of Ti{sup 4+} substitution in ZrW{sub 2}O{sub 8} negative thermal expansion materials
Efficient Calculation of the Negative Thermal Expansion in ZrW2O8
Journal Article
·
Sun Dec 01 00:00:00 EST 1996
· Chemistry of Materials
·
OSTI ID:20699709
Study of Ti{sup 4+} substitution in ZrW{sub 2}O{sub 8} negative thermal expansion materials
Journal Article
·
Wed Aug 15 00:00:00 EDT 2007
· Journal of Solid State Chemistry
·
OSTI ID:20699709
+1 more
Efficient Calculation of the Negative Thermal Expansion in ZrW2O8
Journal Article
·
Mon Jul 30 00:00:00 EDT 2018
· Frontiers in Chemistry
·
OSTI ID:20699709