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Heat capacity and entropy of rutile (tTiO2).and nepheline (NaAlSiO4).

Abstract : From heat capacities measured adiabatically at low temperatures, the standard entropies at 298.15 K of synthetic rutile (TiO2) and nepheline (NaAlSiO4) have been determined to be 50.0 ± 0.1 and 122.8 ± 0.3 J mol−1 K, respectively. These values agree with previous measurements and in particular confirm the higher entropy of nepheline with respect to that of the less dense NaAlSiO4 polymorph carnegieite.
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Submitted on : Wednesday, May 24, 2006 - 10:24:37 AM
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D. de Ligny, Pascal Richet, E.F. Westrum, Jacques Roux. Heat capacity and entropy of rutile (tTiO2).and nepheline (NaAlSiO4).. Physics and Chemistry of Minerals, Springer Verlag, 2002, 29, pp.267-272. ⟨10.1007/s00269-001-0229-z⟩. ⟨hal-00072618⟩



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