1983 Volume 52 Issue 1 Pages 23-24
Raman spectra of K3Co1−xFex(CN)6 (x≈0.03) were measured in the temperature range from room temperature to 22 K. The room temperature phase was the orthorhombic polytype of K3Co(CN)6. It was found that this crystal undergoes a structural phase transition at 81 K from the observation of a soft mode which decreases its frequency as the transition temperature is approached from both sides. On the basis of the polarized Raman measurements of the soft mode and symmetry consideration, the structure below 81 K was found to be monoclinic.
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