Ruthenium(III) fluorideRuthenium fluoride is a fluoride of ruthenium, with the chemical formula of RuF3.PropertiesRuthenium fluoride is a dark brown solid that is insoluble in water. It has a space group of Rc.M. A. Hepworth, K. H. Jack u. a.: The crystal structures of the trifluorides of iron, cobalt, ruthenium, rhodium, palladium and iridium. In: Acta Crystallographica. 10, 1957, S. 63,.PreparationRuthenium fluoride can be obtained from the reduction of ruthenium(V) fluoride by iodine at 250 °C: