In:
Acta Physica Sinica, Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences, Vol. 36, No. 10 ( 1987), p. 1355-
Abstract:
There were three different versions on the space group of β-LaNi5·Hx(x～6) based on the neutron diffrection measurements: P31 m, P321 and P6/mmm. The arguments were investigated by a synthetical study which combinated the proton NMR second moment and the confi-gurational entropy analyses. The statement involved: to make clear a concept of the rigid repel-lence correlation radius rc; to deduce the corelation coefficient taples for P31 m, P321 and P6/ mmm at different rc's; to propose possible statistical assumptions based on the occupation numbers provided by the neutron diffrections; to modify the formula for calculating the configura-tional entropy and to contrast the calculated values with the experimental value of configuration-al entropy; to contrast the NMR second moment calculated under the same statistical assumption with the value of the NMR experiment; to select out a appropriate version which is capable to fit all the experimental facts. Having conducted such a synthetical study, the conclusion is that the space group of β-LaNi5·H6 should be P6/mmm.
Type of Medium:
Online Resource
ISSN:
1000-3290
,
1000-3290
Language:
Unknown
Publisher:
Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences
Publication Date:
1987
