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本文分析了四方晶系所属的68个空间群,对于不对称单位含有一个重原子的情况,获得了导致轻原子位置多解的重原子可能位置、赝对称性、轻原子多解形式、衍射结构振幅分量的分布规律以及由轴的等价性质产生的附加赝消光。68 space groups of the tetragonal system have been analysed for the case of crystals containing one heavy atom in the asymmetric unit. Possible heavy atom positions which lead to multiple solution of the light atoms are tabulated together with the corresponding pseudo-symmetry, the multiple solutions of light atoms and the distribution rule of the components of structure factors among different parity groups.
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