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Low-temperature heat capacity of magnesioferrite (MgFe2O4)

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Abstract

The low-temperature heat capacity of magnesioferrite (MgFe2O4) was measured between 1.5 K and 300 K, and thermochemical functions were derived from the results. No heat capacity anomaly was observed. From our data, we suggest a standard entropy (298.15 K) for magnesioferrite of 120.8±0.6 J mol−1 K−1, which is about 2.4 J mol−1 K−1 higher than previously reported calorimetric studies; but is in rough agreement with predictions from sets of internally consistent thermodynamic data.

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Acknowledgements

We would like to thank Drs G.M. Partzsch (Heidelberg) and C.A. McCammon (Bayreuth) for help with Mössbauer spectroscopy. Our heartfelt thanks are also due to H. Kleinschmidt, I. Glass (Heidelberg), and E. Schmitt (Stuttgart) for technical support in the laboratories and Dr. K.D. Grevel and an anonymous reviewer who helped improved the manuscript.

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  1. Mineralogisches Institut, Universität Heidelberg, Im Neuenheimer Feld 236, 69120, Heidelberg, Germany

    Stephan Klemme

  2. Max-Planck-Institut für Festkörperforschung, Heisenbergstr. 1, 70569, Stuttgart, Germany

    Martin Ahrens

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  1. Stephan Klemme
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Correspondence to Stephan Klemme.

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Klemme, S., Ahrens, M. Low-temperature heat capacity of magnesioferrite (MgFe2O4). Phys Chem Minerals 32, 374–378 (2005). https://doi.org/10.1007/s00269-005-0003-8

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