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引言 根据固态原理,对硅酸盐矿物学的讨论需要了解晶体中化学键的性质。在很多例子中,晶体可以认为是由离子组成,其化学键可以恰当地描述为离子键。一个理想离子晶体晶格内聚能的主要贡献者是库仑能,这是由离子间的所有库仑相互作用产生的。此外,在计算晶体的内聚能时,还必须考虑相近离子之间的排斥作用。对于电荷为Z_i和Z_j的两个离子来说,其简单的内部势能由一个库仑项和一个指数排斥项所组成:
Introduction According to the solid state principle, the discussion of silicate mineralogy requires knowledge of the nature of the chemical bonds in the crystal. In many cases, the crystal can be thought of as consisting of ions whose chemical bonds can properly be described as ionic bonds. The main contributor to the intraocular cohesion of an ideal ionic crystal lattice is Coulomb’s energy, which is caused by all Coulomb interactions between the ions. In addition, when calculating the cohesive energy of a crystal, the repulsion between nearby ions must also be considered. For two ions with charges Z_i and Z_j, their simple internal potential consists of one Coulomb term and one exponential exclusion term: