Published 2009
| Version v1
Miscellaneous
Correlation between AO6 polyhedral distortion and negative thermal expansion in the A2M3O12 family
Creators
- 1. Pontificia Univ. Catolica do Rio de Janeiro (DEMa/PUC/Rio), RJ (Brazil). Dept. de Engenharia de Materiais
- 2. Laboratorio Nacional de Luz Sincrotron (LNLS), Campinas, SP (Brazil)
- 3. Dalhousie Univ., Halifax (Canada). Dept. of Chemistry
Description
The Pbcn orthorhombic phase of Y2Mo3O12 has been examined through in situ high-resolution X-ray powder diffraction (10 K to 450 K) on the D10B-XPD beamline, heat capacity determination (2K to 390 K) and differential scanning calorimetry (103 K to 673 K). From a thorough analysis of the structure of Y2Mo3O12, we found that the YO6 octahedra and MoO4 tetrahedra increased their distortion with increasing temperature. The inherent volume distortion parameter (v) of AO6 has been introduced to quantitatively evaluate polyhedral distortion and it was observed that this parameter is strongly correlated with the linear coefficient of thermal expansion (alpha1) for different members of the A2M3O12 family. (author)
Additional details
Publishing Information
- Imprint Title
- Activity report 2009 - Brazilian Synchrotron Light Laboratory
- Imprint Pagination
- 132 p.
- Journal Page Range
- p. 59-65
- ISSN
- 1518-0204
INIS
- Country of Publication
- Brazil
- Country of Input or Organization
- Brazil
- INIS RN
- 42022953
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S36: MATERIALS SCIENCE; S43: PARTICLE ACCELERATORS;
- Resource subtype / Literary indicator
- Non-conventional Literature
- Descriptors DEI
- BRAZILIAN LNLS; CALORIMETRY; CRYSTALLOGRAPHY; HEAT TRANSFER; LIGHT SOURCES; MOLYBDENUM; ORTHORHOMBIC LATTICES; OXIDES; STORAGE RINGS; STRUCTURAL CHEMICAL ANALYSIS; SYNCHROTRON RADIATION; SYNCHROTRON RADIATION SOURCES; TEMPERATURE MEASUREMENT; X RADIATION; X-RAY DIFFRACTION; X-RAY SOURCES; YTTRIUM
- Descriptors DEC
- BRAZILIAN ORGANIZATIONS; BREMSSTRAHLUNG; CHALCOGENIDES; COHERENT SCATTERING; CRYSTAL LATTICES; CRYSTAL STRUCTURE; DIFFRACTION; ELECTROMAGNETIC RADIATION; ELEMENTS; ENERGY TRANSFER; IONIZING RADIATIONS; METALS; NATIONAL ORGANIZATIONS; OXYGEN COMPOUNDS; RADIATION SOURCES; RADIATIONS; REFRACTORY METALS; SCATTERING; TRANSITION ELEMENTS