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Enthalpic analysis of the CaTiSiO5 system

I. Nerád, L. Kosa, E. Mikšíková, and K. Adamkovičová

Institute of Inorganic Chemistry, Slovak Academy of Sciences, SK-845 36 Bratislava, Slovakia

 

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Received: 13 December 2005  Revised: 4 May 2006  Accepted: 11 May 2006

Abstract: The relative enthalpy of titanite and enthalpy of CaTiSiO5 melt have been measured using drop calorimetry between 823 K and 1843 K. Enthalpies of solution of titanite and CaTiSiO5 glass have been measured by the use of hydrofluoric acid solution calorimetry at 298 K. Enthalpy of vitrification at 298 K, δvitr H(298 K) = (80.7 ± 3.4) kJ mol−1, and enthalpy of fusion at the temperature of fusion 1656 K, δfus H(1656 K) = (139 ± 3) kJ mol−1, of titanite have been determined from experimental data. The obtained enthalpy of fusion is considerably higher than up to the present published values of this quantity.

Full paper is available at www.springerlink.com.

DOI: 10.2478/s11696-006-0047-3

 

Chemical Papers 60 (4) 274–278 (2006)

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