Thermal expansion and phase transitions in the mixed-crystal system (KBr)1-x(KCN)xbetween 5 and 300K
- 20 July 1986
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 19 (20) , L433-L439
- https://doi.org/10.1088/0022-3719/19/20/003
Abstract
For mixed crystals (KBr)1-x(KCN)x the authors measured the linear thermal expansion between 5 and 300K and studied the structural phase transitions (x=1 and 0.70) and the processes for freezing into the orientational glass state (x=0.5 and 0.25). Below 50K, the thermal expansion coefficients for x=0.70, 0.50 and 0.25 exhibit temperature dependences similar to that of potassium halide crystals. At higher temperatures, for (KBr)0.3(KCN)0.7 they observed two subsequent and continuous phase transitions at Tc approximately=180K and 115K, whereas for (KBr)0.5(KCN)0.5 critical behaviour is only evident around the quadrupolar freezing temperature TF approximately=84K.Keywords
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