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应用计算机计算NaCl晶体的平均离子势能 ,通过数值拟合 ,得到平均离子势能与晶体大小关系的函数表达式。结果表明 :NaCl晶体的平均离子势能随晶体增大而变低 ,晶体足够大时趋于恒定值 1 74732 496 ,此即NaCl晶体的Madelung (马德隆 )常数
The average ion potential energy of NaCl crystal was calculated by computer, and the function expression of the relationship between average ion potential energy and crystal size was obtained by numerical fitting. The results show that the average ion potential energy of NaCl crystal decreases with the increase of crystal size, and the crystal constant tends to be 1 74732 496 when the crystal size is large enough, that is, the Madelung constant of NaCl crystal