Correlation of temperature dependencies of thermal expansion and heat capacity of refractory metal up to the melting point: Molybdenum

By the example of molybdenum, the detailed correlation investigation between the volume thermal expansion coefficient, o(T), and the heat capacity, C(T), of the refractory metal is carried out. It is shown that distinct correlation of o(C) takes place not only within the low temperature region where it is linear and is known as the Grüneisen law but also within a much wider temperature region, up to the melting point of the metal. Essential deviation of the o(C) dependency from the low temperature linear behavior takes place when the heat capacity achieves its classical Dulong and Petit limit, 3R.