【摘 要】
：
Cs2SiB4O9和 Cs2GeB4O9都是性能优越的新型非线性光学材料，这两种材料具有相似的晶体结构[1-2]。但是之前的报道所给出的结构还存在很大的问题，并不能体现它们真实的结构特征。我们通过单晶衍射技术和结构精修，在(3+1)维超空间中确定了Cs2SiB4O9和 Cs2GeB4O9的非公度结构。同时与之前报道的平均结构进行了详细的对比。我们的工作对于研究这两种材料物理性能与结构的关联性是至关
【机 构】
：
北京大学化学与分子工程学院,北京市海淀区颐和园路5号,100871 中国科学院福建物质结构研究所,
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Cs2SiB4O9和 Cs2GeB4O9都是性能优越的新型非线性光学材料，这两种材料具有相似的晶体结构[1-2]。但是之前的报道所给出的结构还存在很大的问题，并不能体现它们真实的结构特征。我们通过单晶衍射技术和结构精修，在(3+1)维超空间中确定了Cs2SiB4O9和 Cs2GeB4O9的非公度结构。同时与之前报道的平均结构进行了详细的对比。我们的工作对于研究这两种材料物理性能与结构的关联性是至关重要的。
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