The precipitatation process of rare earth in nitric acid was investigated and the relationship between supersaturation and mean particle size of rare earth oxalate was obtained.

• 本文对硝酸体系中的稀土沉淀过程进行了研究,推导出草酸盐、草酸铵盐、草酸钾盐和草酸钠盐的平均粒径与过饱和度之间的关系。