论文部分内容阅读
用非极性喇曼散射光谱研究了混晶（Ｒｂ_ｘＫ_（１－ｘ））_２ＳｎＣｌ_６性质随组份（０＜ｘ＜１）及温度（１０Ｋ＜Ｔ＜３００Ｋ）的变化。发现在纯Ｋ_２ＳｎＣｌ_６晶体中用Ｒｂ￣＋部分替代Ｋ￣＋后，将降低原Ｋ_２ＳｎＣｌ_６的相变温度Ｔｃｌ。当混晶中Ｒｂ￣＋成份超过极限浓度（ｘ＞０．７）后，该相变就被抑制。不同组份样品的同一喇曼模频率，随Ｒｂ￣＋的增加，向低频方向移动。用平均力常数拟合给出很好的理论解释。
The properties of the mixed crystal (Rb_xK_ (1-x)) _ 2SnCl_6 with the components (0 0.7), the phase change is suppressed. The same Raman mode frequencies of the samples with different compositions shifted to the low frequency with the increase of Rb +. A good theoretical explanation is given by the average force constant fit.