Published January 2005
| Version v1
Journal article
Heat capacity, X-ray scattering and neutron scattering studies in Rb2SeO4
Creators
- 1. Shimane University, Matsue (Japan)
- 2. Yamaguchi University, Yamaguchi (Japan)
- 3. Tokyo Institute of Technology, Yokohama (Japan)
- 4. Nagoya University, Nagoya (Japan)
Description
The structural phase transition and behavior of the Σ2 - Σ3 phonon branch of Rb2SeO4 have been investigated with the use of heat capacity measurement and X-ray and neutron scattering technique. No phase transition was detected down to 2 K, both in thermal analysis and in neutron elastic scattering. However, neutron inelastic scattering showed a slight softening of the phonon excitation frequency below 100 K. Two typical first-order-type anomalies due to the phase I - phase II transition and melting were observed at 821 K and 1233 K, respectively. The entropy change for the phase I - phase II transition was determined as 12.46 Jmol-1K-1.
Additional details
Publishing Information
- Journal Title
- Journal of the Korean Physical Society
- Journal Volume
- 46
- Journal Issue
- 1
- Series
- 18 refs, 4 figs
- Journal Page Range
- p. 235-238
- ISSN
- 0374-4884
INIS
- Country of Publication
- Korea, Republic of
- Country of Input or Organization
- Korea, Republic of
- INIS RN
- 42028358
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- CRYSTAL GROWTH; ELASTIC SCATTERING; ENTROPY; EXCITATION; MONOCRYSTALS; NEUTRON SPECTRA; PHASE TRANSFORMATIONS; PHONONS; RUBIDIUM COMPOUNDS; SPECIFIC HEAT; X-RAY SPECTRA
- Descriptors DEC
- ALKALI METAL COMPOUNDS; CRYSTALS; ENERGY-LEVEL TRANSITIONS; PHYSICAL PROPERTIES; QUASI PARTICLES; SCATTERING; SPECTRA; THERMODYNAMIC PROPERTIES