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Prediction of the crystal structures of perovskites using the software program SPuDS

机译:使用软件程序SPuDS预测钙钛矿的晶体结构

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The software program SPuDS has been developed to predict the crystal structures of perovskites, including those distorted by tilting of the octahedra. The user inputs the composition and SPuDS calculates the optimal structure in ten different Glazer tilt systems. This is performed by distorting the structure to minimize the global instability index, while maintaining rigid octahedra. The location of the A-site cation is chosen so as to maximize the symmetry of its coordination environment. In its current form SPuDS can handle up to four different A-site cations in the same structure, but only one octahedral ion. Structures predicted by SPuDS are compared with a number of previously determined structures to illustrate the accuracy of this approach. SPuDS is also used to examine the prospects for synthesizing new compounds in tilt systems with multiple A-site coordination geometries (a(+)a(+)a(+), a(0)b(+)b(+), a(0)b(-)c(+)). [References: 91]
机译:已经开发了软件程序SPuDS来预测钙钛矿的晶体结构,包括那些由于八面体倾斜而扭曲的晶体结构。用户输入成分,SPuDS在十种不同的Glazer倾斜系统中计算出最佳结构。这是通过使结构变形以使整体不稳定性指数最小化,同时保持刚性八面体来实现的。选择A位阳离子的位置以使其配位环境的对称性最大化。以目前的形式,SPuDS可以在同一结构中处理多达四个不同的A位阳离子,但只能处理一个八面体离子。将SPuDS预测的结构与许多先前确定的结构进行比较,以说明此方法的准确性。 SPuDS还用于检查具有多个A位置配位几何形状(a(+)a(+)a(+),a(0)b(+)b(+),a (0)b(-)c(+))。 [参考:91]

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