Neodymium(III) fluoride

Neodymium(III) fluoride
Names
	Other names Neodymium trifluoride
Identifiers
CAS Number	13709-42-7;
3D model (JSmol)	Interactive image;
ChemSpider	75499;
ECHA InfoCard	100.033.852
EC Number	237-253-3;
PubChem CID	83676;
CompTox Dashboard (EPA)	DTXSID7065592 ;
	InChI InChI=1S/3FH.Nd/h3*1H;/q;;;+3/p-3 Key: XRADHEAKQRNYQQ-UHFFFAOYSA-K;
	SMILES F[Nd](F)F;
Properties
Chemical formula	NdF3
Molar mass	201.24 g/mol
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	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

Neodymium(III) fluoride is an inorganic chemical compound of neodymium and fluorine with the formula NdF₃. It is a purplish pink colored solid with a high melting point.

Preparation

Like other lanthanide fluorides it is highly insoluble in water which allows it to be synthesised from aqueous neodymium nitrate via a reaction with hydrofluoric acid, from which it precipitates as a hydrate:^[1]

Nd(NO₃)_3(aq) + 3 HF → NdF₃•½H₂O + 3 HNO₃

It can also be obtained by the reaction of neodymium(III) oxide and hydrofluoric acid:^[2]

Nd₂O₃ + 6HF → 2NdF₃ + 3H₂O

Anhydrous material may be obtained by the simple drying of the hydrate, in contrast to the hydrates of other neodymium halides, which form mixed oxyhalides if heated.^[1]

Uses

Neodymium(III) fluoride is often used in the manufacture of fluoride glasses.^[3]

When neodymium is extracted from ores, the fluoride is often an intermediate product and is then reduced to the solid metal chemically (e.g. by adding calcium, which produces calcium fluoride) or by fused-salt electrolysis.

Other compounds

Neodymium(III) fluoride forms compounds with N₂H₄, such as NdF₃•3N₂H₄•3H₂O which is a white hexagonal crystal, soluble in water, slightly soluble in methanol and ethanol, with d20°C = 2.3547 g/cm³.^[4]

References

^ ^a ^b Greenwood, N. N.; Earnshaw, A. (1997). Chemistry of the elements (2nd ed.). Butterworth-Heinemann. p. 1240. ISBN 0-7506-3365-4.
^ Georg Brauer (Hrsg.), unter Mitarbeit von Marianne Baudler u. a.: Handbuch der Präparativen Anorganischen Chemie. 3., umgearbeitete Auflage. Band I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6, S. 254.
^ Sigma-Aldrich Co., product no. {{{id}}}.
^ Izvestii︠a︡ vysshikh uchebnykh zavedeniĭ: Khimii︠a︡ i khimicheskai︠a︡ tekhnologii︠a︡, Tập 16,Số phát hành 1 (Ivanovskiĭ khimiko-tekhnologicheskiĭ in-t, 1973), pages 181–182. Retrieved 19 Jan 2021.

[greenshaw-1] Greenwood, N. N.; Earnshaw, A. (1997). Chemistry of the elements (2nd ed.). Butterworth-Heinemann. p. 1240. ISBN 0-7506-3365-4.

[brauer-2] Georg Brauer (Hrsg.), unter Mitarbeit von Marianne Baudler u. a.: Handbuch der Präparativen Anorganischen Chemie. 3., umgearbeitete Auflage. Band I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6, S. 254.

[Sigma-3] Sigma-Aldrich Co., product no. {{{id}}}.

[4] Izvestii︠a︡ vysshikh uchebnykh zavedeniĭ: Khimii︠a︡ i khimicheskai︠a︡ tekhnologii︠a︡, Tập 16,Số phát hành 1 (Ivanovskiĭ khimiko-tekhnologicheskiĭ in-t, 1973), pages 181–182. Retrieved 19 Jan 2021.

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