Holmium(III) nitrate


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]

Holmium(III) nitrate
Other names
Holmium trinitrate, Holmium nitrate
  • anhydrous: 10168-82-8
  • pentahydrate: 14483-18-2
  • hexahydrate: 35725-31-6
3D model (JSmol)
  • Interactive image
  • pentahydrate: Interactive image
  • hexahydrate: Interactive image
  • anhydrous: 26948008
  • pentahydrate: 21241428
  • hexahydrate: 34196
ECHA InfoCard 100.030.386 Edit this at Wikidata
EC Number
  • 233-438-8
  • pentahydrate: 25021754
  • hexahydrate: 37257
  • DTXSID40890649 Edit this at Wikidata
  • pentahydrate: DTXSID80648469
  • hexahydrate: DTXSID10189254
  • InChI=1S/Ho.3NO3/c;3*2-1(3)4/q+3;3*-1
  • pentahydrate: InChI=1S/Ho.3NO3.5H2O/c;3*2-1(3)4;;;;;/h;;;;5*1H2/q+3;3*-1;;;;;
  • hexahydrate: InChI=1S/Ho.3NO3.6H2O/c;3*2-1(3)4;;;;;;/h;;;;6*1H2/q+3;3*-1;;;;;;
  • [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[Ho+3]
  • pentahydrate: [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].O.O.O.O.O.[Ho+3]
  • hexahydrate: [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].O.O.O.O.O.O.[Ho+3]
Molar mass 350,95
Appearance Yellowish crystals
Melting point 754 °C (1,389 °F; 1,027 K)
GHS labelling:
GHS03: OxidizingGHS07: Exclamation mark
H272, H315, H319, H335
P210, P220, P221, P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P370+P378, P403+P233, 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

Synthesis Edit

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


Effect of nitrogen dioxide on metallic holmium:


Reaction of holmium hydroxide and nitric acid:


Physical properties Edit

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 Edit

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

Application Edit

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

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

References Edit

  1. ^ Лидин, Ростислав; Молочко, Вадим; Андреева, Лариса (2 February 2019). Константы неорганических веществ. Справочник (in Russian). Litres. p. 40. ISBN 978-5-04-077039-7. Retrieved 18 August 2021.
  2. ^ "14483-18-2 - Holmium(III) nitrate pentahydrate, REacton®, 99.9% (REO) - 14588 - Alfa Aesar". Alfa Aesar. Retrieved 18 August 2021.
  3. ^ "Holmium(III) nitrate pentahydrate". Sigma Aldrich. Retrieved 18 August 2021.