Abstract: A new method--atomic correlation method for describing structures of solids is presented. We begin with the definitions of atomic correlations, basis vectors of correlations, correlation lattice and reciprocal correlation lattice. We then analyse the different manifestation of atomic correlations in crystals, quasicrystals and amorphous solids. Finally, we discuss diffractions in solids and derive the general form of Laue equation, demonstrating that quasicrystals can also form sharp diffraction patterns.

Key words: structures of solids, atomic correlations, Bragg diffraction

摘要： 提出一个描述固体结构的新方法——原子相关性方法。给出原子相关性、相关性基矢、相关性格子及其倒格子的定义，分析对比原子相关性在晶体、准晶和非晶中的不同表现。从原子相关性出发讨论了固体的衍射问题，说明准晶也能产生明锐的Bragg衍射并导出普遍形式的Laue方程。

关键词: 固体结构, 原子相关性, Bragg衍射