Elastic behavior of the carbon tetrabromide clathrate of hexakis(phenylthio)benzene as determined by brillouin spectroscopy

Authors:

• Darek Michalski,
• Bogusław Mróz,
• Harry Kiefte,
• Mary Anne White,
• Maynard J. Clouter

Abstract

Brillouin scattering measurements have been carried out at room temperature on the CBr₄ clathrate of hexakis-(phenylthio)benzene. This material crystallizes in the R3 space group (trigonal system), with a host:guest mole ratio of 1:2. The values of all seven adiabatic elastic constants were determined. The material is elastically more anisotropic than the previously investigated ethanol-Dianin's compound clathrate which has the same space group, yet the bulk modulus and the linear compressibilities of these materials are similar. These investigations reveal that noncentral forces act in the CBr₄-HPTB crystal; these elastic properties may significantly affect other properties such as thermal conductivity. © 1993 American Chemical Society.