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

Thermodynamic Equilibrium between Melt and Crystalline Phase of a Compound A_qB_r with Dystectic Melting Point.  IV. Application to the Systems NaF—NaMgF₃ and KF—KMgF₃

I. Proks and V. Daněk

Institute of Inorganic Chemistry, Slovak Academy of Sciences, SK-842 36 Bratislava

Abstract: The LeChatelier-Shreder equation describing the equilibrium between crystalline phase and melt in the system A-AB when substance AB partially dissociates upon melting was applied in the systems NaF-NaMgF₃ and KF-KMgF₃. The dissociation enthalpy, the heat of fusion at dystectic temperature of fusion, and the degree of dissociation of compounds NaMgF₃ and KMgF₃, formed in the melt, were calculated without using any fictive quantity. The dissociation degrees of NaMgF₃ and KMgF₃ have been found to be α₊ (NaMgF₃) = 0.23 and α₊(KMgF₃) = 0.11, respectively.

Full paper in Portable Document Format: 553a142.pdf

Chemical Papers 55 (3) 142–144 (2001)