Solid state decomposition studies on fluoroperoxo species of transition metals. IV. Photodecomposition of K 3Zr 2(O 2) 2F 7 · 2H 2O

The kinetics of photodecomposition of solid K ₃Zr ₂(O ₂) ₂F ₇ · 2H ₂O have been studied under vacuum as a function of intensity and temperature by measuring the evolved oxygen with the help of a McLeod Gauge. Pressure-time curves are parabolic in nature and the data fit the empirical equation p = kt ^{1}/{2}. The rate of photodecomposition is a linear function of intensity. The activation energy determined from an Arrhenius plot, in the temperature range 15-55°C, of the title compound is 2.15 kcal mole ^-1 (9.00 kJ mole ^-1).