REACTION OF STANNOUS FLUORIDE IN HYDROGEN-PEROXIDE

The reaction of SnF2 stannous fluoride with aqueous solutions of H2O2 hydrogen peroxide was studied as a function of the molar ratio H2O2/SnF2, in the range 0.02 to 5.00. The products were characterized by thermal analysis, X-ray diffraction and tin-119 Mossbauer spectroscopy. The X-ray diffraction pattern of all samples shows only highly broadened lines, characteristic of microcrystalline SnO2 (average particle diameter: 39 Angstrom). Thermal analyses show that the material is hydrated. Mossbauer spectroscopy gives a broad single line at approximately 0 mm/s, characteristic of SnO2 for all samples, and in some cases a tin(II) doublet with delta = 3.1 mm/s and Delta = 1.9 mm/s.