Europium(III) nitrate

Europium(III) nitrate is an inorganic compound with the formula Eu(NO₃)₃·x(H₂O). The hexahydrate is a common salt. It forms colorless hygroscopic crystals.

Europium(III) nitrate

Names
IUPAC name Europium trinitrate
Identifiers
CAS Number	10138-01-9 (anhydrous) Y 10031-53-5 (hexahydrate) Y
3D model (JSmol)	Interactive image
ChemSpider	23353 (anhydrous) 175150 (hexahydrate)
ECHA InfoCard	100.030.333
PubChem CID	54604362 (anhydrous) 202256 (hexahydrate)
CompTox Dashboard (EPA)	DTXSID80890643
InChI InChI=1S/Eu.3NO3.6H2O/c;3*2-1(3)4;;;;;;/h;;;;6*1H2/q+3;3*-1;;;;;; Key: JVYYYCWKSSSCEI-UHFFFAOYSA-N
SMILES [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].O.O.O.O.O.O.[Eu+3]
Properties
Chemical formula	Eu(NO3)3
Molar mass	337.985 g/mol 446.081 g/mol (hexahydrate)
Melting point	65[1] °C (149 °F; 338 K) (hexahydrate) decomposes
Solubility in water	Soluble
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H272, H315, H319, H335
Precautionary statements	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
Other anions	Europium(III) phosphate Europium(III) arsenate
Other cations	Samarium(III) nitrate Gadolinium(III) nitrate
Related compounds	Europium(II) nitrate Europium(III) oxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Europium(III) nitrate hexahydrate under fluorescent lamp (left) and UV light (right).

Preparation

The salt is usually obtained by dissolving europium(III) oxide (Eu₂O₃) in nitric acid produces europium(III) nitrate.^[2]

Eu₂O₃ + 6 HNO₃ → 2 Eu(NO₃)₃ + 3 H₂O

Structure

Like all trinitrates of the lanthanides, dilute (<0.01 M) solutions of consists of the aquo complex [Eu(H₂O)_x]³⁺ where x = 8 or 9. At higher concentrations, the binding of nitrate to Eu is observed.^[3]

Complexes

Europium(III) nitrate reacts with anions and other Lewis bases to form complexes. For example, with 1,3,5-trimesic acid, europium metal-organic framework, a coordination polymer, under hydrothermal conditions.^[4]