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首页> 外文期刊>Crystallography reports >Structural Phase Transition in Crystals of the Molecular Conductor alpha '-(BDH-TTP)(6)[Hg(SCN)(3)][Hg(SCN)(4)]
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Structural Phase Transition in Crystals of the Molecular Conductor alpha '-(BDH-TTP)(6)[Hg(SCN)(3)][Hg(SCN)(4)]

机译:分子导体α'-(BDH-TTP)(6)[Hg(SCN)(3)] [Hg(SCN)(4)]晶体的结构相变

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摘要

Single crystals or the organic conductor alpha'-(BDH-TTP)(6)[Hg(SCN)(3)][Hg(SCN)(4)] are studied by low-temperature X-ray diffraction at 100-300 K. It is shown that, in the temperature range 250-200 K, the compound undergoes a phase transition, which is accompanied by the appearance of superstructure reflections and a rapid increase in their intensity due to the partial anion and cation ordering. The superstructure is observed down to a temperature of 100 K, at which the set of diffraction data is collected. The temperature dependence of the electrical resistance exhibits a minimum in the range of the structural transition temperature. Under a pressure of up to 10 kbar, the general behavior of the dependence remains unchanged and only the minimum is shifted toward the low-temperature range. The phase transition is completely reversible.
机译:在100-300 K下通过低温X射线衍射研究了单晶或有机导体α'-(BDH-TTP)(6)[Hg(SCN)(3)] [Hg(SCN)(4)]结果表明,在250-200 K的温度范围内,该化合物经历了相变,由于部分阴离子和阳离子的有序排列,伴有上层结构反射的出现和强度的快速增加。在低至100 K的温度下观察上部结构,在该温度下收集一组衍射数据。电阻的温度依赖性在结构转变温度的范围内显示出最小值。在最高10 kbar的压力下,依存关系的一般行为保持不变,只有最小值移向低温范围。相变是完全可逆的。

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