Journal article
The Structural Phase Transition in Octaflournaphtalene
UNEP Risoe Centre on Energy, Climate and Sustainable Development (URC), Systems Analysis Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark1
Systems Analysis Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark2
Risø National Laboratory for Sustainable Energy, Technical University of Denmark3
The phase transition in octafluoronaphthalene has been investigated by Raman scattering and neutron powder diffraction. The weight of the experimental evidence points to a unit cell doubling in the a direction, but with no change in space group symmetry. Lattice dynamics calculations support this evidence and indicate that the mechanism of the phase transition may well be the instability of a zone boundary acoustic mode of librational character.
The structure of the low-temperature phase has been refined and the Raman spectra of the upper and lower phases are reported.
| Language: | English |
|---|---|
| Year: | 1977 |
| Pages: | 1133-1149 |
| ISSN: | 17473802 and 00223719 |
| Types: | Journal article |
| DOI: | 10.1088/0022-3719/10/8/016 |
