Chemistry:Holmium(III) nitrate

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Holmium(III) nitrate
Holmium nitrate.jpg
Names
Other names
Holmium trinitrate, Holmium nitrate
Identifiers
3D model (JSmol)
ChemSpider
EC Number
  • 233-438-8
Properties
Ho(NO3)3
Molar mass 350,95
Appearance Yellowish crystals
Melting point 754 °C (1,389 °F; 1,027 K)
Soluble
Hazards
GHS pictograms GHS03: OxidizingGHS07: Harmful
GHS Signal word Warning
H272, H315, H319, H335
P210, P220, P221, P261, P264, P271, P280, P302+352, P304+340, P305+351+338, P312, P321, P332+313, P337+313, P362, P370+378, P403+233, P405, P501
Related compounds
Related compounds
Terbium(III) nitrate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
Tracking categories (test):

Holmium (III) nitrate is an inorganic compound, a salt of holmium and nitric acid with the chemical formula Ho(NO3)3.[1] The compound forms yellowish crystals, dissolves in water, also forms crystalline hydrates.[2]

Synthesis

Anhydrous salt is obtained by the action of nitrogen dioxide on holmium(III) oxide:

[math]\displaystyle{ \mathsf{2Ho_2O_3 + 9N_2O_4 \ \xrightarrow{150^oC}\ 4Ho(NO_3)_3 + 6NO } }[/math]

Effect of nitrogen dioxide on metallic holmium:

[math]\displaystyle{ \mathsf{Ho + 3N_2O_4 \ \xrightarrow{200^oC}\ Ho(NO_3)_3 + 3NO } }[/math]

Reaction of holmium hydroxide and nitric acid:

[math]\displaystyle{ \mathsf{Ho(OH)_3 + 3NHO_3 \ \xrightarrow{150^oC}\ Ho(NO_3)_3 + 3H_2O } }[/math]

Physical properties

Holmium(III) nitrate forms yellowish crystals.

Forms a crystalline hydrate of the composition Ho(NO3)3•5H2O.[3]

Soluble in water and ethanol.

Chemical properties

Hydrated holmitic nitrate thermally decomposes to form HoONO3 and decomposes to holmium oxide upon subsequent heating.

Application

The compound is used for the production of ceramics and glass.

Also used to produce metallic holmium and as a chemical reagent.

References

Salts and covalent derivatives of the nitrate ion