Neodymium nitrate

Neodymium nitrate is an inorganic salt with the formula Nd(NO₃)₃·(x(H₂O) . It is typically encountered as the hexahydrate, Nd(NO₃)₃·6H₂O, which is more accurately formulated as [Nd(NO₃)₃(H₂O)₄]·2H₂O to reflect the crystal structure. It crystallizes in the triclinic space group P1 with the following cell parameters: a = 9.307(1)°, b = 11.747(1)°, c = 6.776(1)°, α = 91.11(1) Å, β = 112.24(1) Å, γ = 109.15(1) Å.^[1] It decomposes to NdONO₃ at elevated temperature.^[2]

Neodymium(III) nitrate

Names
Other names Neodymium trinitrate
Identifiers
CAS Number	10045-95-1 hexahydrate: 16454-60-7
3D model (JSmol)	Interactive image hexahydrate: Interactive image
ChemSpider	9155614
ECHA InfoCard	100.030.127
EC Number	233-153-9
PubChem CID	204494
CompTox Dashboard (EPA)	DTXSID30890638
InChI hexahydrate: InChI=1S/3NO3.Nd.6H2O/c3*2-1(3)4;;;;;;;/h;;;;6*1H2/q3*-1;+3;;;;;; Key: VQVDTKCSDUNYBO-UHFFFAOYSA-N
SMILES [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[Nd+3] hexahydrate: [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-].O.O.O.O.O.O.[Nd+3]
Properties
Chemical formula	Nd(NO3)3(H2O)x
Molar mass	330.25 g/mol (anhydrous) 438.35 g/mol (hexahydrate)
Appearance	vibrant pink/violet solid
Density	6.5g/cm3
Melting point	1,374 °C (2,505 °F; 1,647 K)
Structure
Coordination geometry	Tricapped trigonal prismatic (nine-coordinate)
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H272, H302, H312, H315, H319, H332, H335
Precautionary statements	P261, P264, P270, P271, P280, P301+P312, P302+P352, P304+P312, P304+P340, P305+P351+P338, P312, P321, P322, P330, P332+P313, P337+P313, P362, P363, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

It is used in the extraction and purification of neodymium from its ores.^[3]