Uranium trifluoride

Uranium trifluoride is an inorganic chemical compound with the chemical formula UF₃.

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[1]
Density	8.9 g/cm^3[1]
Melting point	1,495 °C (2,723 °F; 1,768 K)[1]
Structure
Crystal structure	Rhombohedral, hP24
Space group	P63cm, No. 185[2]
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

Synthesis

Uranium trifluoride can be obtained by reacting uranium(IV) fluoride with aluminium at 900 °C or with uranium:[3]

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

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

References

1. Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 4.97. ISBN 1439855110.
2. 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. doi:10.1107/S0365110X49001016.
3. Brauer, Georg (ed.) (1978) Handbuch der Präparativen Anorganischen Chemie. Vol 3. Enke, Stuttgart. ISBN 3-432-87813-3. p. 1207