The linear thermal expansion of lead halide (PbCl2, PbBr2, Pbl(2)) Crystals was measured between room temperature and their melting points. Using the temperature dependence of linear thermal expansion Deltal/l, the coefficients of linear thermal expansion a and their temperature dependencies were calculated and the results presented. The thermal expansion of compounds such as CuCl, CsPbCl3, CsPbBr3 and RbPbCl3 was also measured and the changes in a were used in the study of polymorphism in lead halides. [References: 20]
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