Gadolinium(III) nitrate


Gadolinium(III) nitrate is an inorganic compound of gadolinium. This salt is used as a water-soluble neutron poison in nuclear reactors.[1] Gadolinium nitrate, like all nitrate salts, is an oxidizing agent.

Gadolinium(III) nitrate
Gadolinium nitrate.png
  • 10168-81-7
3D model (JSmol)
  • Interactive image
  • 140078 checkY
ECHA InfoCard 100.030.385 Edit this at Wikidata
  • 159266
  • DTXSID80890648 Edit this at Wikidata
  • InChI=1S/Gd.3NO3/c;3*2-1(3)4/q+3;3*-1 checkY
  • InChI=1/Gd.3NO3/c;3*2-1(3)4/q+3;3*-1
  • [Gd+3].O=[N+]([O-])[O-].[O-][N+]([O-])=O.[O-][N+]([O-])=O
Molar mass 343.26 g/mol
Appearance White crystalline solid
Density 2.3 g/cm3
Melting point 91 °C (196 °F; 364 K)
Safety data sheet (SDS) External MSDS
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

The most common form of this substance is hexahydrate Gd(NO3)3•6H2O with molecular weight 451.36 g/mol and CAS Number: 19598-90-4.[1]


Gadolinium nitrate was used at the Savannah River Site heavy water nuclear reactors and had to be separated from the heavy water for storage or reuse.[2][3] The Canadian CANDU reactor, a pressurized heavy water reactor, also uses gadolinium nitrate as a water-soluble neutron poison in heavy water.

Gadolinium nitrate is also used as a raw material in the production of other gadolinium compounds, for production of specialty glasses and ceramics and as a phosphor.


  1. ^ DOE Fundamentals Handbook: Nuclear Physics and Reactor Theory (PDF). U.S. Department of Energy. January 1993. p. 31. Archived from the original (PDF) on 2008-04-23. Retrieved 2007-09-26.
  2. ^ E. Wilde; C. Berry. "Novel Method for Removing Gadolinium from Used Heavy Water Reactor Moderator".
  3. ^ E.W. Wilde; M.B. Goli; C.J. Berry; J.W. Santo Domingo; H.L. Martin. "Novel Method for Removing Gadolinium from Used Heavy Water Reactor Moderator" (PDF).