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用草酸盐共沉淀工艺以草酸铵作沉淀剂制备了四方晶系的(Gd,Ba,Fe)多元草酸盐。用X射线衍射物相分析、磁分析和电子显微镜观察等方法探讨了四方晶系草酸盐的生成过程和热分解。在我们的实验条件下,四方晶系草酸盐是在草酸铵溶液中由α型草酸盐转变过来的。它在草酸铵溶液中和在空气中是比较稳定的。四方晶系草酸盐的热分解过程与α型、β型Fe_2C_2O_4·2H_2O相似。
The tetragonal (Gd, Ba, Fe) polybasic oxalate was prepared by the oxalate coprecipitation process with ammonium oxalate as precipitant. The formation and thermal decomposition of tetragonal oxalate were investigated by X-ray diffraction (XRD), magnetic analysis and electron microscopy. In our experimental conditions tetragonal oxalate was converted from alpha oxalate in ammonium oxalate solution. It is relatively stable in ammonium oxalate solution and in the air. The thermal decomposition of tetragonal oxalate is similar to that of α, β Fe_2C_2O_4 · 2H_2O.