Heat capacity of liquid hafnium from the melting point to the boiling point at atmospheric pressure

The temperature dependence of the heat capacity of highly pure hafnium (zirconium content of $0.14\%$ by mass) in the liquid state is measured from the melting point to $5000$ K. A sample in the form of a wedge made up by two thin strips of hafnium foil is heated by an electric current pulse. The temperature is measured by a high-speed pyrometer. The radiation from the space formed by foil strips is directed to the pyrometer via fiber-optical light guide. The specific heat capacity of liquid hafnium at atmospheric pressure from the melting point $(2504$ K$)$ to the boiling point $(4875$ K$)$ exhibits an increasing pattern similar to that of the previously investigated heat capacity of liquid zirconium.