电子衍射图自动标定中初基解的判据

在电子衍射图的自动标定中,将距中心最近的两个衍射斑点与计算出的两个倒易矢量r₁^*及r₂^*对比,可得r₁^*×r₂^*=Au。不过,有时会出现与非初基倒易平面胞对应的非初基解。对于简单布喇菲点阵,显然A=1是初基解的判据。对于有心布喇菲点阵的初基解,在u,v,w三个指数的不同组合的情况下,A也有确定值。关键词：

CRITERION OF PRIMITIVE SOLUTIONS IN THE AUTOMATIC INDEXING OF ELECTRON DIFFRACTION PATTERNS

Electron diffraction patterns can be automatically indexed by comparing two nearest diffraction spots with two calculated reciprocal vectors r₁^* and r₂^*2, r₁^*×r₂^*= Au. However, non-primitive solutions corresponding to non-primitive reciprocal plane cells, sometimes result. For simple Bravais lattices, obviously A=1 is the criterion of primitive solutions. For primitive solutions in centred Bravais lattices, it has been shown that A has also specified values for various combinations of u, v, w indices.