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在体心立方晶体的[100]方向上,计算了最近邻和次近邻相互作用的晶格振动比仅计算最近邻相互作用的更好.晶格波的简并度降低,更加符合群论和实验结果.“,”Inthe[1 0 0 ]directionofbcccryctal,thelatticevibrationofcalculaedfirstandsecond - nearestneighbourinteractionissuperiortothatofonlycalculaedfirstneighbourinteraction .Thede genercyoflatticewaveisdegradated ,andthesolutionisnearerastheresultofexperimentand grouptheory .