Phase Diagram of the MgF2–SrF2 System and Interactions of Magnesium and Strontium Fluorides with Other Fluorides

• Published in: Russian journal of inorganic chemistry Vol. 68; no. 12; pp. 1789 - 1798
• Main Authors: Fedorov, P. P., Pynenkov, A. A., Uslamina, M. A., Ushakov, S. N., Voronov, V. V., Alexandrov, A. A., Chernova, E. V., Nishchev, K. N.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.12.2023; Springer Nature B.V
• Subjects: Cations; Chemistry; Chemistry and Materials Science; Differential thermal analysis; Electronegativity; Inorganic Chemistry; Lewis acid; Magnesium fluorides; Metal fluorides; Phase diagrams; Physicochemical Analysis of Inorganic Systems; Stability analysis; Strontium; Strontium compounds; Strontium fluorides; X ray powder diffraction; strontium fluoride; Lewis acids and bases; cumulative moment of cations; phase diagram; magnesium fluoride; electronegativity; SrMgF; amphotericity; thermal analysis
• ISSN: 0036-0236; 1531-8613
• DOI: 10.1134/S0036023623602325

The phase diagram of the SrF 2 –MgF 2 system has been studied by differential thermal analysis (DTA) and X-ray powder diffraction (XRD). The stability area of the compound SrMgF 4 is very small, and its extent is about 20°С between 870 and 890°С. The formation of compounds by magnesium fluoride and strontium fluoride with other metal fluorides is considered in the M versus X coordinates, where M is the cumulative moment of the cation and X is the cation electronegativity. Two areas of compound formation were identified for each of the fluorides. Magnesium and strontium fluorides are amphoteric compounds in terms of the Lewis acid and base theory.