Le Page Y, Downham D A
Institute for Environmental Chemistry, NRC, Ottawa, Canada.
J Electron Microsc Tech. 1991 Aug;18(4):437-9. doi: 10.1002/jemt.1060180413.
Provided that multiple reflection is present, a common occurrence with electron diffraction on microcrystallites, a single unindexed convergent-beam electron diffraction (CBED) pattern taken with the beam axis parallel to any direct lattice row allows the volume of the primitive cell to be calculated. The film measurements required are the diameters of the successive high-order Laue zones (HOLZ), the lengths of any two coprime vectors in the zero-order Laue zone (ZOLZ), and the angle between them. The primitive cell volume is an objective criterion allowing in a simplification in the identification of a phase under study by rapidly eliminating other possible phases. The computer program CELVOL for the calculation of the primitive cell volume from film measurements, or from literature cells, is available from the authors.
如果存在多重反射（这在微晶的电子衍射中很常见），当束轴平行于任何一个正格子行拍摄单个未标定的会聚束电子衍射（CBED）图案时，就可以计算原胞的体积。所需的薄膜测量值是连续高阶劳厄区（HOLZ）的直径、零阶劳厄区（ZOLZ）中任意两个互质矢量的长度以及它们之间的夹角。原胞体积是一个客观标准，通过快速排除其他可能的相，可简化对所研究相的鉴定。作者提供了用于根据薄膜测量值或文献中的晶胞计算原胞体积的计算机程序CELVOL。
