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Determination of the Enthalpy of Fusion of K2NbF7 and K3NbF8

L. Kosa, I. Macková, and M. Chrenková

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

 

E-mail: uachkosa@savba.sk

Received: 27 December 2002

Abstract: On the basis of the areas of the fusion and crystallization peaks of K2NbF7 and K3NbF8 determined using the DSC mode of the high-temperature calorimeter (SETARAM 1800 K), and the temperature dependence of the calorimetric method sensitivity, the values of the enthalpy of fusion of K2NbF7 at equilibrium temperature of fusion 1008 K: ΔfusHm(K2NbF7) = (38 ± 1) kJ mol−1 and the enthalpy of fusion of K3NbF8 at equilibrium temperature of fusion 1043 K: ΔfusHm(K3NbF8) = (57 ± 2) kJ mol−1 have been determined.

Full paper in Portable Document Format: 575a301.pdf

 

Chemical Papers 57 (5) 301–303 (2003)

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