Schorne Pinto, Juliano
and Janghorban, Amin and Lomello-Tafin, Marc and Pisch, Alexander and Mikaelian, Georges and Benigni, Pierre and Barnabé, Antoine and Cassayre, Laurent
Assessment of thermodynamic data for CuCrO2 delafossite from calorimetric measurements.
(2019)
Thermochimica Acta, 680. 178345. ISSN 0040-6031
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(Document in English)
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Official URL: https://doi.org/10.1016/j.tca.2019.178345
Abstract
A detailed investigation of the thermodynamic properties of delafossite CuCrO2 was carried out by experimental methods on synthetic CuCrO2 delafossite samples (differential scanning calorimetry from ambient to 871 K and drop calorimetry from 823 to 1123 K) and theoretical methods (density functional theory). Based on these data and available literature (low temperature heat capacity measurements and calculations, high temperature emf data), we propose, for the first time, a full set of thermodynamic data for the phase CuCrO2. Our selection comes to: ΔfH°298(CuCrO2) = −670.8 ± 1.3 kJ mol−1, S°298(CuCrO2) = 88.9 J K−1, and cp°(T)=1.02564.102-2.87159.107 T-3-1.28542.105 T-1.5 (298 < T < 1300 K).
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