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 (θE) and the electronic heat capacity coefficient (γe) of the normal state were derived as (307 ± 5) K and (4.22 ± 0.20) mJ⋅K- 2⋅mol- 1, respectively. The standard entropy of the superconducting standard state was derived as S◦ m (298.15) = (36.8 ± 1.3) J⋅K- 1⋅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.
ZAPPEY Joaquina;
MOORE Emily E.;
BENES Ondrej;
GRIVEAU Jean-Christophe;
KONINGS Rudy;
2024-02-19
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
JRC133141
0021-9614 (online),
https://www.sciencedirect.com/science/article/pii/S0021961423001970?via%3Dihub,
https://publications.jrc.ec.europa.eu/repository/handle/JRC133141,
10.1016/j.jct.2023.107200 (online),
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