Abstract:
The relations of the model of a two-phase local equilibrium region are used to calculate the temperature dependences of the heat capacities and coefficients of thermal linear expansion of the palladium triad $(\rm Ru{,}~\rm Rh{,}~\rm Pd)$ and platinum triad $(\rm Os{,}~\rm Ir{,}~\rm Pt)$ in the presence (absence) of an aggregate transition in the studied temperature range. In contrast to the approximation functions used in the scientific literature in individual temperature intervals (using, in particular, the Einstein function), the proposed formulas are simple, universal, and adequately describe the experimental data in the temperature range from $0$ K to high temperatures. They can be used to create computer programs for calculating the specified characteristics of various solids, for example, when developing technologies for the rational use of noble metals.
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