Lattice parameters and thermal expansion of zinc telluride and mercury selenide

The lattice parameters of zinc telluride and mercury selenide were measured with a Unicam 19 cm high-temperature powder camera; the following equations represent the results: ZnTe, a_t = 6.1016 + 54.63 × 10^-6t + 6.82 × 10^-9t² + 5.28 × 10^-12t³; HgSe, a_t = 6.0854 + 28.61 × 10^-6t + 4.93 × 10^-9t² + 3.74 × 10^-12t³. The expressions for thermal expansion coefficients are also given.