A pressure-induced phase transition of CsBr was found by using energy dispersive x-ray diffraction with a synchrotron x-ray source. The cubic phase CsBr was found to undergo transformation to a tetragonal crystal structure under high pressure similar to that recently reported for CsI. We suggest again that macroscopic elastic instability theory provides a possible explanation of this kind of phase transition.
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Huang et al. (1984) studied this question.
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