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碱卤化合物和MgO的离子间距-压强关系分析
引用本文:刘泉,陈立溁. 碱卤化合物和MgO的离子间距-压强关系分析[J]. 高压物理学报, 2005, 19(2): 159-163
作者姓名:刘泉  陈立溁
作者单位:安徽师范大学物理系,安徽,芜湖,241000;安徽师范大学物理系,安徽,芜湖,241000
摘    要: 给出了一种新的方法来决定固体的离子间距与压强的关系,并将这种方法应用到碱卤化合物和MgO晶体。这种新方法的理论基础是利用Hildebrand 近似、并运用Harrison的处理方法来考虑排斥能,即考虑离子间的相互作用直到次临近离子。还利用了更精确的方法来计算偶极子-偶极子和偶极子-四极子之间的相互作用。利用这种新方法得到的结果和实验结果吻合得很好。

关 键 词:Harrison模型  Hildebrand近似  van der Waals(vdW)能量
收稿时间:2004-02-16;

Analysis of Interatomic Separation-Pressure Relations for Alkali Halides and Periclase(MgO)
LIU Quan,CHEN Li-Rong. Analysis of Interatomic Separation-Pressure Relations for Alkali Halides and Periclase(MgO)[J]. Chinese Journal of High Pressure Physics, 2005, 19(2): 159-163
Authors:LIU Quan  CHEN Li-Rong
Affiliation:Department of Physics, Anhui Normal University, Wuhu 241000, China
Abstract:A new method for the determination of interatomic separation-pressure relations is investigated and applied for alkali halides and MgO crystals. The method is developed by using Hildebrand approximation and an ionic model based on Harrison's treatment of overlap repulsive potential which takes into account the interactions up to second neighbors. The van der Waals dipole-dipole and dipole-quadrupole interactions calculated by more accurate methods are also included in the present work. It is found that the new method yield satisfactory results in agreement with the available experimental data.
Keywords:Harrison's model  Hildebrand approximation  van der Waals (vdW) energies
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