caa a22 4500 463217667 CHVBK 20180405153202.0 cr unu---uuuuu 170326e20070301xx s 000 0 eng 10.1007/s00269-006-0128-4 doi (NATIONALLICENCE)springer-10.1007/s00269-006-0128-4 Low-temperature heat capacities of MgAl2O4 and spinels of the MgCr2O4-MgAl2O4 solid solution [Elektronische Daten] [Stephan Klemme, Martin Ahrens] We present results from low-temperature heat capacity measurements of spinels along the solid solution between MgAl2O4 and MgCr2O4. The data also include new low-temperature heat capacity measurements for MgAl2O4 spinel. Heat capacities were measured between 1.5 and 300K, and thermochemical functions were derived from the results. No heat capacity anomaly was observed for MgAl2O4 spinel; however, we observe a low-temperature heat capacity anomaly for Cr-bearing spinels at temperatures below 15K. From our data we calculate standard entropies (298.15K) for Mg(Cr,Al)2O4 spinels. We suggest a standard entropy for MgAl2O4 of 80.9± 0.6 Jmol−1 K−1. For the solid solution between MgAl2O4 and MgCr2O4, we observe a linear increase of the standard entropies from 80.9 Jmol−1K−1 for MgAl2O4 to 118.3Jmol−1 K−1 for MgCr2O4. Springer-Verlag, 2006 Calorimetry nationallicence Heat capacity nationallicence Spinel nationallicence Chromite nationallicence MgAl2O4 nationallicence MgCr2O4 nationallicence Phase transition nationallicence Klemme Stephan School of GeoSciences, University of Edinburgh, The Grant Institute, West Mains Rd, EH9 3JW, Edinburgh, UK aut Ahrens Martin Max-Planck-Institut für Festkörperforschung, Heisenbergstr. 1, 70569, Stuttgart, Germany aut Physics and Chemistry of Minerals Springer-Verlag 34/2(2007-03-01), 59-72 0342-1791 34:2<59 2007 34 269 https://doi.org/10.1007/s00269-006-0128-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00269-006-0128-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Klemme Stephan School of GeoSciences, University of Edinburgh, The Grant Institute, West Mains Rd, EH9 3JW, Edinburgh, UK aut NATIONALLICENCE 700 1- Ahrens Martin Max-Planck-Institut für Festkörperforschung, Heisenbergstr. 1, 70569, Stuttgart, Germany aut NATIONALLICENCE 773 0- Physics and Chemistry of Minerals Springer-Verlag 34/2(2007-03-01), 59-72 0342-1791 34:2<59 2007 34 269 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer