ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Determination of the enthalpy of fusion of K₃TaO₂F₄ and KTaF₆

Ladislav Kosa, Iveta Macková, and Zuzana Netriová

Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, SK-845 36 Bratislava, Slovakia

E-mail: uachivaz@savba.sk

Received: 21 July 2008  Revised: 13 January 2009  Accepted: 14 January 2009

Abstract: Areas of fusion and crystallization peaks of K₃TaO₂F₄ and KTaF₆ were measured using the DSC mode of a high-temperature calorimeter (SETARAM 1800 K). On the basis of these quantities, considering the temperature dependence of the calorimeter sensitivity, values of the fusion enthalpy of K₃TaO₂F₄ at the fusion temperature of 1181 K of (43 ± 4) kJ mol⁻¹ and of KTaF₆ at the fusion temperature of 760 K of (8 ± 1) kJ mol⁻¹ were determined.

Keywords: K₃TaO₂F₄  - KTaF₆  - enthalpy of fusion - high-temperature calorimeter

Full paper is available at www.springerlink.com.

DOI: 10.2478/s11696-009-0039-1

Chemical Papers 63 (4) 493–496 (2009)