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VOLUME 31 (1980) | ISSUE 2 | PAGE 107
"Phason" in the submillimeter spectrum of CsCuCI3 single crystals
A high Q, low-frequency mode resulting from phase fluctuations of the helicoid spatial modulation of the crystal's structure was observed in the spectrum of the low-temperature phase of a hexagonal CsCuCl3 perovskite by using the submillimeter-spectroscopy method.