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根据已知的489个具有钙钛矿结构的复氧化物,以及若干非钙钛矿结构的复氧化物的实测数据,采用模式识别-原子参数方法总结钙钛矿结构形成和晶格畸变的半经验规律.结果表明:Goldschmidt的t因子只能提供形成钙钛矿结构的必要.条件而非充分条件.必须将离子的半径、元素的电负性、价数等都作为参数,才能建立有效的数学模型,总结和预报钙钛矿结构的形成、畸变和晶胞参数.据此数学模型开发了能检索和预报钙钛矿结构形成、畸变和晶胞参数的智能数据库,并对未列入数据库的Eu（Mn0.5Ni0.5）O3等8个新发现的化合物的晶型类别作了计算机“预报”,“预报”结果与实验相符.
Based on the known data of 489 complex oxides with perovskite structure and several non-perovskite complex oxides, the pattern recognition-atomic parameter method was used to summarize the formation of the perovskite structure and the half-lattice distortion Empirical results.The results show that Goldschmidt’s t-factor can only provide the necessary conditions for the formation of perovskite structure, but not sufficient conditions.It is necessary to take the radius of ions, the electronegativity of elements and valence as parameters to establish effective Mathematical model to summarize and predict the formation, distortion and unit cell parameters of perovskite structure.According to the mathematical model, an intelligent database that can retrieve and predict perovskite structure, distortion and unit cell parameters has been developed. Eu (Mn0.5Ni0.5) O3 and other eight new types of compounds were found in the computer type “forecast”, “forecast” results in line with the experiment.