Dysprosium(III) nitrate
Dysprosium(III) nitrate is an inorganic compound, a salt of dysprosium and nitric acid with the chemical formula Dy(NO3)3. The compound forms yellowish crystals, dissolves in water, forms a crystalline hydrate. Synthesis
Anhydrous salt is obtained by the action of nitrogen dioxide on dysprosium(III) oxide:

The action of nitrogen dioxide on metallic dysprosium:

Physical properties
Dysprosium(III) nitrate forms yellowish crystals. Forms a crystalline hydrate of the composition Dy(NO3)3*5H2O, which melts in its own crystallization water at 88.6 °C. Soluble in water and ethanol, hygroscopic. Chemical properties
Hydrated dysprosium nitrate thermally decomposes to form DyONO3, and further heating produces dysprosium oxide. Application
Dysprosium(III) nitrate is used as a catalyst. References

Dysprosium compounds
Nitrates