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

Aslanyan, T. A.; Shigenari, T.; Abe, K.; Semagin, D. A.

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

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Description

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.
3 pages, 1 figure