 It is thermally unstable, with a decomposition rate of 10% per hour at room temperature.Krypton difluoride is endothermic, with a heat of formation of 14.4 ± 0.8 kcal/mol measured at 93 °C.Krypton difluoride can be synthesized using many different methods including electrical discharge, photoionization, hot wire, and proton bombardment.