| Numéro |
J. Phys. Colloques
Volume 42, Numéro C6, Décembre 1981
International Conference on Phonon Physics
|
|
|---|---|---|
| Page(s) | C6-637 - C6-639 | |
| DOI | https://doi.org/10.1051/jphyscol:19816185 | |
International Conference on Phonon Physics
J. Phys. Colloques 42 (1981) C6-637-C6-639
DOI: 10.1051/jphyscol:19816185
1 Bhabha Atomic Research Centre, Trombay, Bombay 400 085, India
2 Nuclear Physics Division
J. Phys. Colloques 42 (1981) C6-637-C6-639
DOI: 10.1051/jphyscol:19816185
NEUTRON, X-RAY AND LATTICE DYNAMICAL STUDIES OF Sb2 S3
K.R. Rao1, 2, V. M. Padmanabhan1, Neutron Physics Division, P.R. Vijayaraghavan1, 2 et S.L. Chaplot1, 21 Bhabha Atomic Research Centre, Trombay, Bombay 400 085, India
2 Nuclear Physics Division
Abstract
'Elastic'neutron and x-ray diffraction patterns from crystals of Sb2S3 (minera1 stibnite) show that the crystals, while ordered along <010> (the chain axis) , are disordered about <010>. Extensive diffuse intensity perpendicular to <010> direction is observed. Inelastic scattering studies using 1.4Å neutrons did not lead to any soft TA modes with q in the (OkO) plane and polarised along <010>. A few longitudinal phonons along <010> are seen. Results from lattice dynamical calculations based on a rigid ion model (with covalent bonding included) are discussed in the context of these observations.