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用FORTRAN语言编写了晶体点阵未知情况下标定电子衍射谱的程序。从旋转晶体得出的两张电子衍射底片上选三个衍射斑点,相当于不在一个平面上的三个倒易矢量,构成一个三斜倒易基胞。计算以此为基的一些倒易矢量的长度,从中选三个最短而又不在一个平面上的倒易矢量为初基矢AS(1),AS(2),AS(3),构成倒易空间的Buerger胞。由此即可进一步确定正空间中布喇菲点阵的类型及单胞参数,同时得出这三个衍射斑点的指数。
The FORTRAN language was used to program the calibration of electron diffraction spectra without knowing the crystal lattice. Three diffraction spots are selected from two electron diffraction films obtained from a rotating crystal, which are equivalent to three reciprocal vectors not in one plane and constitute a trisialis reciprocal cell. Computation of the length of some reciprocal vector based on this, from the selection of the shortest but not in a plane of the reciprocal vector as the initial basis vectors AS (1), AS (2), AS (3) Space of Buerger cells. From this we can further determine the type and unit cell parameters of the Bravais lattice in the positive space and obtain the indices of the three diffraction spots.