The control of structures and properties in crystalline materials has many returns that justify the increasing efforts in this direction. Traditionally, crystal engineering focused on the rational design of single component molecular crystals or supramolecular compounds (i.e., cocrystals). More recently, reports on crystalline solid solutions have become common in crystal engineering research. Crystalline solid solutions are characterized by a structural disorder that enables the variation of stoichiometry in continuum. Often such variation corresponds to a variation of structural and physicochemical properties, and offers an opportunity for the materials’ fine-tuning. In some cases, though, new and unexpected properties emerge. As illustrated here, both behaviors make solid solutions particularly relevant to the scope of crystal engineering.

中文翻译：

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通过固体溶液工程晶体特性

对晶体材料的结构和性质的控制具有许多回报，这证明了朝该方向的不断努力。传统上，晶体工程关注于单组分分子晶体或超分子化合物（即共晶体）的合理设计。最近，关于晶体固溶体的报道在晶体工程研究中变得很普遍。结晶固溶体的特征在于结构无序，该结构无序使连续化学计量变化。通常，这种变化对应于结构和物理化学特性的变化，并为材料的微调提供了机会。但是，在某些情况下，会出现新的和意外的属性。如此处所示，这两种行为都是与晶体工程范围特别相关的可靠解决方案。