Title :
Synchrotron-radiation X-ray powder diffraction study of α- and β-Zn4Sb3 compounds
Author :
Souma, T. ; Nakamoto, G. ; Kurisu, M. ; Kato, K. ; Takata, M.
Author_Institution :
JAIST, Japan
Abstract :
The crystal structures of the α- and β-Zn4Sb3 have been investigated by the synchrotron-radiation X-ray powder diffraction at temperatures of 180 to 295 K. The Rietveld analysis indicates that the α-Zn4Sb3 possesses a rhombohedral structure with R-3c as the β-Zn4Sb3 does. The β- to α-phase structural transition is of 2nd order and accompanies the reduction in the c/a and increase in volume (Δa/a>0 and Δc/c<0). The atomic displacement parameters and bond distance are calculated.
Keywords :
X-ray diffraction; bond lengths; crystal structure; solid-state phase transformations; thermoelectricity; zinc compounds; α-Zn4Sb3; β-Zn4Sb3; 180 to 295 K; Rietveld analysis; Zn4Sb3; atomic displacement parameters; bond distance; crystal structures; rhombohedral structure; synchrotron-radiation X-ray powder diffraction; Atomic measurements; Extrapolation; Lattices; Powders; Reflection; Strontium; Temperature dependence; X-ray diffraction; Zinc;
Conference_Titel :
Thermoelectrics, 2003 Twenty-Second International Conference on - ICT
Print_ISBN :
0-7803-8301-X
DOI :
10.1109/ICT.2003.1287504
