Thermal Properties of Strontium Nitrate by X-Rays

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  • Thermal Properties of Strontium Nitrate

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The lattice parameter aT of strontium nitrate has been measured in the temperature range 261 to 740 K using a high temperature X-ray djffractometer and a 10-cm diameter symmetrically focusing back-reflection camera. aT is found to increase parabolicaiiy with temperature. The linear thermal expansion coefficient α is calculated by differentiation of aT with respect to temperature. The α values and the available data on specific heat Cp and elastic constants (C11, C12) are used in calculating the Grüneiscn parameter γ at different Temperatures. The temperature dependence of the lattice vibrational frequencies is found using the values of α and γ.

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