镁合金中长周期堆垛结构的衍射斑点为啥是这样？

下图细条纹的衍射斑点
对应斑点的值

堆垛结构的衍射斑点

截屏太差了，重新做一张吧。

现在想问一下牛人，没有出现想要的衍射斑点原因是什么？
1）选区没有选好
2）照的时候没有调整好角度，还是没有选好入射方向。
3）第一张图片中的层片不是长周期结构
还是有什么问题···

您说的是第一张吗，这个对衍射斑点没有影响吧

这是文献里的关于这种结构的衍射

为什么我们做不出来人这张效果

偶说的是沙发，看着太乱。

The long-period stacking order (LPSO) structures in rapidly solidified Mg97Zn1Y2 alloy have been studied by conventional and highresolution
transmission electron microscopes (HRTEMs). There are four kinds of stacking sequences in the LPSO structures, i.e., 18R of
ABABABCACACABCBCBC, 14H ofACBCBABABABCBC, 10H ofABACBCBCABand 24R ofABABABABCACACACABCBCBCBC.
The 18R structure is dominantly observed in the present study. The rest three are occasionally observed in places. The 10H and 24R structures
are recently discovered. The lattice constants of 18R(1 -1 1 -1 2)₃, 14H(-2 1 -2 1 -1 1 -1 2-1 2), 10H(1 -3 1 -1 3 -1) and 24R(1 -1 1 -1 1 -1 2)₃ structures are
estimated to be a = 0.320 nm and c = 4.678 nm, a = 0.325 nm and c = 3.694 nm, a = 0.325 nm and c = 2.603 nm, a = 0.322 nm and c = 6.181 nm
for the hexagonal structure, respectively
不知道在我这张图中怎么去标a，c的值