Comment on the "Origin of the opalescence at the α--β transition of quartz: role of the incommensurate phase studied by synchrotron radiation"

Details Comment on the "Origin of the opalescence at the α--β transition of quartz: role of the incommensurate phase studied by synchrotron radiation" Comment on the "Origin of the opalescence at the α--β transition of quartz: role of the incommensurate phase studied by synchrotron radiation"

2005-06-22

arxiv.org/abs/cond-mat/0506561v2

Physics

Condensed Matter

Materials Science

3 pages, 1 figure

Scientific paper

The interpretation of the origin of the light scattering anomalies near the transition from incommensurate (IC) to the alpha-phase of quartz by Dolino et al. (Phys. Rev. Lett. 94, 155701 (2005)) is commented. It is shown that the observed IC structure is a pure transverse acoustic (TA) modulation without any soft optic mode component. Such a modulation cannot be responsible for the observed light scattering contrary to the interpretation by Dolino et al.

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