Low- and high-temperature heat capacity of metallic technetium

The heat capacity of technetium metal has been measured from 2.1 K to 293 K using relaxation calorimetry and the enthalpy increment up to 1700 K using drop calorimetry. The low-temperature calorimetry measurements revealed a superconducting transition temperature of TC = (7.76 +/- 0.08) K. The zero-degree Debye temperature (theta E) and the electronic heat capacity coefficient (gamma e) of the normal state were derived as (307 +/- 5) K and (4.22 +/- 0.20) mJ center dot K-2 center dot mol-1, respectively. The standard entropy of the superconducting standard state was derived as S degrees m (298.15) = (36.8 +/- 1.3) J center dot K-1 center dot mol-1. The fitting of enthalpy-increment data together with high-temperature heat capacity data reported in literature yielded a heat capacity equation up to 1700 K.

Automated summary

In this study, the heat properties of technetium metal were measured and analyzed using various thermal measurement methods, including its superconductivity, zero-degree Debye temperature, electronic heat capacity coefficient, and the standard entropy of the superconducting state.