Actinium oxyfluoride

Actinium oxyfluoride is an inorganic compound, with the chemical formula AcOF. It is radioactive. It crystallises in a calcium fluoride structure. It can be obtained by reacting actinium fluoride with ammonia and water:


 * AcF3 + 2 NH3 + H2O → AcOF + 2 NH4F

The reaction proceeds completely at 1200 °C, and unreacted AcF3 will remain at lower temperatures.