Dysprosium(III) fluoride

Dysprosium(III) fluoride is an inorganic compound of dysprosium with a chemical formula DyF3.

Production
Dysprosium(III) fluoride can be produced by mixing dysprosium(III) chloride or dysprosium(III) carbonate into 40% hydrofluoric acid.


 * DyCl3 + 3 HF → DyF3 + 3 HCl
 * Dy2(CO3)3 + 6 HF → 2 DyF3 + 3 H2O + 3 CO2

DyF3 can also be produced by hydrothermal reaction of dysprosium nitrate and sodium tetrafluoroborate at 200 °C.

DyF3 can also be produced when dysprosium oxide and ammonium bifluoride are mixed and heated to 300 °C until the oxide is porous, and continued to heat to 700 °C. When hydrogen fluoride is introduced, a reaction occurs:


 * Dy2O3 + 6 HF → 2 DyF3 + 3 H2O

Properties
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).