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本文系统论述实现Σ4关系计算的具体方法及其实际应用价值。对五个不同类型的已知晶体结构计算表明,利用Σ4关系能够获得大量的、可靠性较高的O,π型结构半不变量相角。文中讨论了它们在测定晶体结构中的可能应用前景。We describe systematically the procedure to realize calculation of ∑4 relationship and its practical value for crystal structure determination. The computations for five differet crystal structures indicate that a number of O, π type semi-invarant phases with high reliability can be obtaind using ∑4 relationship. The possible applications of the procedure in crystal structure determination are discussed.
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