Dysprosium(III) nitrate
# Dysprosium(III) nitrate

Dysprosium(III) nitrate is an inorganic compound, a salt of dysprosium and nitric acid with the chemical formula $Dy(NO_3)_3.$ 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:

       ${\mathsf {2Dy_{2}O_{3}+9N_{2}O_{4}\ {\xrightarrow {150^{o}C}}\ 4Dy(NO_{3})_{3}+6NO}}$

The action of nitrogen dioxide on metallic dysprosium:

       ${\mathsf {Dy+3N_{2}O_{4}\ {\xrightarrow {200^{o}C}}\ Dy(NO_{3})_{3}+3NO}}$

## Physical properties

Dysprosium(III) nitrate forms yellowish crystals.

Forms a crystalline hydrate of the composition ${\ce {Dy(NO3)3*5H2O}}$, 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 ${\ce {DyONO3}}$, and further heating produces dysprosium oxide.

## Application

Dysprosium(III) nitrate is used as a catalyst.

