Uranium hexafluoride

Uranium hexafluoride
Names
	IUPAC names Uranium hexafluoride; Uranium(VI) fluoride
Identifiers
CAS Number	7783-81-5 ;
3D model (JSmol)	Interactive image;
Abbreviations	hex
ChEBI	CHEBI:30235 ;
ChemSpider	22966 ;
ECHA InfoCard	100.029.116
EC Number	232-028-6;
Gmelin Reference	2923
PubChem CID	24560;
RTECS number	YR4720000;
UNII	N06GJ1D94J ;
UN number	2978 (<1% 235U); 2977 (>1% 235U)
CompTox Dashboard (EPA)	DTXSID4074566 ;
	InChI InChI=1S/6FH.U/h61H;/q;;;;;;+6/p-6 Key: SANRKQGLYCLAFE-UHFFFAOYSA-H ; InChI=1/6FH.U/h61H;/q;;;;;;+6/p-6/rF6U/c1-7(2,3,4,5)6 Key: SANRKQGLYCLAFE-IIYYNVFAAT;
	SMILES F[U](F)(F)(F)(F)F;
Properties
Chemical formula	UF6
Molar mass	352.02 g/mol
Appearance	Colorless solid
Density	5.09 g/cm3, solid
Boiling point	56.5 °C (133.7 °F; 329.6 K) (sublimes, at atmospheric pressure)
Solubility in water	Hydrolyzes
Solubility	Soluble in chloroform, CCl4, liquid chlorine, and bromine; Dissolves in nitrobenzene; 151 kPa;
Structure
Crystal structure	Orthorhombic, oP28
Space group	Pnma, No. 62
Coordination geometry	Octahedral (Oh)
Dipole moment	0
Thermochemistry
Std molar; entropy (S⦵298)	Solid, 227.8±1.3 J·K−1·mol−1; Gaseous, 377.8±1.3 J·K−1·mol−1;
Std enthalpy of; formation (ΔfH⦵298)	Solid, −2197.7±1.8 kJ·mol−1; Gaseous, −2148.1±1.8 kJ·mol−1;
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Toxic, corrosive, radioactive
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H300, H330, H373, H411
NFPA 704 (fire diamond)	4 0 2 W; OX
Flash point	Non-flammable
Safety data sheet (SDS)	ICSC 1250
Related compounds
Other anions	Uranium hexachloride
Other cations	Neptunium hexafluoride; Plutonium hexafluoride; Americium hexafluoride; Curium hexafluoride; Tungsten hexafluoride;
Related uranium fluorides	Uranium(III) fluoride; Uranium(IV) fluoride; Uranium(V) fluoride;
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Uranium hexafluoride, sometimes called hex, is an inorganic compound with the formula U F₆. Uranium hexafluoride is a volatile white solid that reacts with water, releasing corrosive hydrofluoric acid. The compound reacts mildly with aluminium, forming a thin surface layer of AlF₃ that resists any further reaction from the compound. UF₆ is used in the process of enriching uranium, which produces fuel for nuclear reactors and nuclear weapons.

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