It has been proved that the pigment is fluorite solid solution and the size of its crystalline grain is 17.90nm from the analysis of XRD, SEM, EDS and CIE parameters.

• XRD；SEM；EDS；CIE色度分析的研究结果表明；该红色稀土颜料为萤石型固溶体；其晶粒尺寸为17.；90nm。