Thermodynamic properties of nickel chromite (NiCr 2 O 4 ) based on adiabatic calorimetry at low temperatures

The hitherto unknown low-temperature heat capacity of nickel chromite (NiCr2O4) was measured between 8 and 381 K using adiabatic calorimetry, and some thermochemical functions [CP(T), S(T), S°298, H(T)−H(0)] were derived from the results. The standard entropy (S°298=140.0 ± 0.3 J mol−1 K−1) for nick...

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Bibliographic Details
Published inPhysics and chemistry of minerals Vol. 29; no. 10; pp. 663 - 667
Main Authors Klemme, S., van Miltenburg, J. C.
Format Journal Article
LanguageEnglish
Published Heidelberg Springer Nature B.V 01.12.2002
Subjects
Adiabatic flow
Anomalies
Calorimetry
Chromite
Entropy
Heat measurement
Literature reviews
Low temperature
Nickel
Thermodynamic properties
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Summary:The hitherto unknown low-temperature heat capacity of nickel chromite (NiCr2O4) was measured between 8 and 381 K using adiabatic calorimetry, and some thermochemical functions [CP(T), S(T), S°298, H(T)−H(0)] were derived from the results. The standard entropy (S°298=140.0 ± 0.3 J mol−1 K−1) for nickel chromite was calculated from the results. Our calorimetric measurements indicate three major anomalies in the heat-capacity curve at temperatures between 8 and 381 K. A short literature review indicates that two of these anomalies can be accounted for, whereas an anomaly peaking at 29 K has not been reported previously.
ISSN:0342-1791
1432-2021
DOI:10.1007/s00269-002-0280-4