New thermodynamic data for CoTiO3, NiTiO3 and CoCO3 based on low-temperature calorimetric measurements.
Klemme S, Hermes W, Eul M, Wijbrans CH, Rohrbach A, Pöttgen R
Research article (journal) | Peer reviewedAbstract
ABSTRACT: The low-temperature heat capacities of nickel titanate (NiTiO3), cobalt titanate (CoTiO3), and cobalt carbonate (CoCO3) were measured between 2 and 300 K, and thermochemical functions were derived from the results. Our new data show previously unknown low-temperature lambda-shaped heat capacity anomalies peaking at 37 K for CoTiO3 and 26 K for NiTiO3. From our data we calculate standard molar entropies (298.15 K) for NiTiO3 of 90.9 ± 0.7 J mol-1 K-1 and for CoTiO3 of 94.4 ± 0.8 J mol-1 K-1. For CoCO3, we find only a small broad heat capacity anomaly, peaking at about 31 K. From our data, we suggest a new standard entropy (298.15 K) for CoCO3 of 88.9 ± 0.7 J mol-1 K-1.
Details about the publication
Journal: Chemistry Central Journal
Volume: 5
Status: Published
Release year: 2011 (31/12/2011)
Language in which the publication is written: English
Authors from the University of Münster
| Eul, Matthias | |
| Klemme, Stephan | |
| Pöttgen, Rainer | |
| Rohrbach, Arno | |
| Wijbrans, Clazina |
Doctorates the publication originates from
| Stability of Majorite garnet in the deep Earth Candidate: Wijbrans, Clazina H. (gen. Ineke) | Supervisors: Klemme, Stephan Period of time: 01/10/2011 - 27/11/2015 Doctoral examination procedure finished at: Doctoral examination procedure at University of Münster |