volume 138, issue 1, P31-34 2007
DOI: 10.1016/j.mseb.2006.12.014
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Abstract: Dilatometric measurement of thermal expansion and birefringence measurement were done for [(CH 3 ) 2 NH 2 ] 3 CuCl 5 single crystal along three crystallographic axis in the temperature range 305-240 K. Thermal expansion showed clearly two successive phase transitions at T 1 = 278.3 ± 0.3 K and T 2 = 253.4 ± 0.2 K on cooling run with thermal hysteresis of a few degrees. The obtained on cooling changes of | V/V| are equal to (2.37 ± 0.15) × 10 −3 at 278.3 K and (2.61 ± 0.15) × 10 −3 at T 1 and T 2 , respectivel…

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