A study of the phase diagrams of (NH4)3Ga1-xScxF6 ammonium cryolites

Mikhail V. Gorev (1) , Igor N. Flerov (1) , Alain Tressaud (2) , Dominique Denux (2) , A. I. Zaitsev (1) , V. D. Fokina (1)

1 Kirensky Institute of Physics, Siberian Division
2 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

This paper reports on the results of analyzing p-T and x-T phase diagrams and calorimetric properties of solid solutions in (NH4)3Ga1 - xScxF6 cryolites with scandium concentrations x = 0.0, 0.1, 0.35, 0.4, 0.6, 0.8, and 1.0. The thermodynamic parameters of the phase transitions observed in the studied compounds are determined. The generalized phase diagram and successive structural transformations in a series of (NH4)3Me3+F6 ammonium cryolites are discussed.

Mots clés: Phase diagrams; Ammonium

Domaines: Matériaux

Mikhail V. Gorev, Igor N. Flerov, Alain Tressaud, Dominique Denux, A. I. Zaitsev, et al.. A study of the phase diagrams of (NH4)3Ga1-xScxF6 ammonium cryolites. Physics of the Solid State, 2002, 44 (10), pp.1954-1960. ⟨10.1134/1.1514787⟩. ⟨hal-00817770⟩