Аннотация:The crystallization of PbCl2-PbF2-PbO-SiO2 glasses, including those Nd-doped, has been studied under various temperature conditions. The crystalline phases and the change in the density of the samples after crystallization were determined. The effect of crystallization and formation of halide or oxohalide phases on the luminescent properties of Nd3+ in glasses and glass-ceramics has been studied.