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1前言（1）粘土矿物层间交换性质是粘土最重要的性质之一，在新材料研制、农业、环境、地质等各大领域中均有重要应用。（2）研究层间交换的传统方法有热力学和晶体化学方面的方法。回避了结构的热力学方法是利用△Gex来定性讨论的，其缺点很明显：对细小、变化大的粘土矿物用
1 Preface (1) The inter-layer exchange property of clay minerals is one of the most important properties of clay. It has important applications in the fields of new material development, agriculture, environment and geology. (2) The traditional methods of studying the interlayer exchange are thermodynamics and crystallographic methods. The thermodynamic method that avoids the structure is qualitatively discussed by means of △ Gex. The disadvantage is obvious: for small and variable clay minerals