Hafnium nitrateHafnium nitrate is an inorganic compound, a salt of hafnium and nitric acid with the chemical formula Hf4.SynthesisHafnium nitrate can be prepared by the reaction of hafnium tetrachloride and dinitrogen pentoxide.PropertiesHafnium nitrate is slightly volatile, and can be sublimed at 110 °C and 0.1 mmHg. Hafnium nitrate decomposes on heating to HfO2 and then to HfO2.ApplicationsHafnium nitrate can be used for the preparation of materials containing hafnium dioxide.