Dysprosium(III) fluoride is an inorganic compound of dysprosium with a chemical formula DyF<sub>3</sub>.
Dysprosium(III) fluoride can be produced by mixing dysprosium(III) chloride or dysprosium(III) carbonate into 40% hydrofluoric acid.
DyF<sub>3</sub> can also be produced by hydrothermal reaction of dysprosium nitrate and sodium tetrafluoroborate at 200 ðC.
DyF<sub>3</sub> can also be produced when dysprosium oxide and ammonium bifluoride are mixed and heated to 300 ðC until the oxide is porous, and continued to heat to 700 ðC. When hydrogen fluoride is introduced, a reaction occurs:
Dysprosium(III) fluoride is a white, odorless solid that is insoluble in water. It has an orthorhombic crystal structure with the space group Pnma (space group no. 62).