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1·The physical meaning of reciprocal lattice of two-dimensional crystal and weight of the lattice point are explored.

讨论了二维晶体倒易点阵的物理内容和点阵点的权重。

2·Regarding the reciprocal lattice primitive cells basic vectors as two line space basic vectors, this paper finds a new matrix method to work out the reciprocal lattice primitive cell.

视正格子原胞基矢和倒格子原胞基矢为线性空间的两个基底，提出了求解倒格子原胞的一种新的矩阵算法。

3·It is proved that the volume of Brillouin zone and that of the reciprocal lattice primitive cell are equal for BCC lattice and FCC lattice in three dimensions by a simple mathematical method.

用简单数学方法就体心立方晶格和面心立方晶格证明了三维情况下布里渊区体积等于倒格子原胞体积。