Uranium trifluoride

Uranium trifluoride
Names
	Other names Trifluorouranium
Identifiers
CAS Number	13775-06-9;
3D model (JSmol)	Interactive image;
ChemSpider	75544;
ECHA InfoCard	100.033.990
PubChem CID	83722;
CompTox Dashboard (EPA)	DTXSID2065624 ;
	InChI InChI=1S/3FH.U/h3*1H;/q;;;+3/p-3;
	SMILES F[U](F)F;
Properties
Chemical formula	UF3
Molar mass	295.024 g/mol
Appearance	purple solid
Density	8.9 g/cm3
Melting point	1,495 °C (2,723 °F; 1,768 K)
Structure
Crystal structure	Rhombohedral, hP24
Space group	P63cm, No. 185
Lattice constant	a = 0.7181 nm, c = 0.7348 nm
Lattice volume (V)	0.32815
Formula units (Z)	6
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Uranium trifluoride is an inorganic chemical compound with the chemical formula U F₃.

Synthesis

Uranium trifluoride can be obtained by reacting uranium(IV) fluoride with aluminium at 900 °C or with uranium:^[4]

\mathrm {UF_{4}+Al\longrightarrow UF_{3}+AlF}

\mathrm {3\ UF_{4}+U\longrightarrow 4\ UF_{3}}

^ ^a ^b ^c Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 4.97. ISBN 1-4398-5511-0.
^ Holleman, Arnold F.; Wiberg, Egon; Wiberg, Nils (2007). Lehrbuch der anorganischen Chemie (in German). Berlin. p. 1969. ISBN 978-3-11-017770-1. OCLC 180963521.{{cite book}}: CS1 maint: location missing publisher (link)
^ Zachariasen, W. H. (1949). "Crystal chemical studies of the 5f-series of elements. XII. New compounds representing known structure types" (PDF). Acta Crystallographica. 2 (6): 388–390. Bibcode:1949AcCry...2..388Z. doi:10.1107/S0365110X49001016.
^ Brauer, Georg (ed.) (1978) Handbuch der Präparativen Anorganischen Chemie. Vol 3. Enke, Stuttgart. ISBN 3-432-87813-3. p. 1207

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