Synthesis and thermal behavior of new hydridofluorides
of potassium-calcium KCaH3-xFx WITH x = 1, 1.5, 2, 2.5
J-Ph. Soulié, A. Bouamrane*
Laboratoire d'Analyse Environnementale des Procédés et des Systèmes Industriels, Institut National des Sciences
Appliquées de Lyon, Bât Sadi Carnot, 7 rue de la Physique,69621 Villeurbanne Cedex, France
* Corresponding author. E-mail : email@example.com
Received : 04 July 2001; revised version accepted 04 February 2002
New hydridofluorides of potassium-calcium KCaH3-xFx with x = 1, 1.5, 2 and2.5 have been obtained in the KF-CaH2-CaF2 system. They crystallize with an orthorhombic perovskite-type structure and lattice parameters were determined.
The thermal behavior of the four compounds has been studied by Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TGA). Every DSC curve reveals a sharp anomalywith low energies; the temperature of anomalies depends to rate of fluor present in the samples.
Keywords : Hydridofluoride; Perovskite; Thermal analysis.