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利用CCD单晶衍射仪对草莓红绿柱石进行晶体结构测定,测定其空间群为R3c,并讨论了结构中Li+有序地置换Be2+造成c/a值的变化特征。晶体中发现复三方偏三角面体的负晶包裹体,其宏观对称属m,它与空间群Rc相对应,但与测出晶体结构的空间群有矛盾。X射线结构测定已否定了其空间群为Rm的看法。要解决草莓红绿柱石晶体空间群是否有对称中心(Rc或Rc)的问题,还需进一步将X射线结构的数据及其有关的电性实验结合分析。
The crystal structure of strawberry bixbyte was determined by CCD single crystal diffractometer. The space group R3c was determined. The change of c / a value was also discussed when Li + orderedly substituted Be2 + in the structure. Crystal found in complex trigonal triangular body negative crystal inclusions, the macroscopic symmetry is m, which corresponds to space group Rc, but with the crystal structure of the space group contradictions. X-ray structure determination has denied its space group is R m view. To solve the problem of whether there is a symmetry center (Rc or Rc) in strawberry-birch crystal space group, the data of X-ray structure and its related electrical experiments need to be further analyzed.