Uranium hexafluoride

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Uranium hexafluoride

Names
IUPAC names Uranium hexafluoride Uranium(VI) fluoride
Identifiers
CAS Number	7783-81-5 Y
3D model (JSmol)	Interactive image
Abbreviations	hex
ChEBI	CHEBI:30235 Y
ChemSpider	22966 Y
ECHA InfoCard	100.029.116
EC Number	232-028-6
Gmelin Reference	2923
PubChem CID	24560
RTECS number	YR4720000
UNII	N06GJ1D94J Y
UN number	2978 (<1% 235U) 2977 (>1% 235U)
CompTox Dashboard (EPA)	DTXSID4074566
InChI InChI=1S/6FH.U/h6*1H;/q;;;;;;+6/p-6 Y Key: SANRKQGLYCLAFE-UHFFFAOYSA-H Y InChI=1/6FH.U/h6*1H;/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[1]
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[2] Gaseous, 377.8±1.3 J·K−1·mol−1[2]
Std enthalpy of formation (ΔfH⦵298)	Solid, −2197.7±1.8 kJ·mol−1[2] Gaseous, −2148.1±1.8 kJ·mol−1[2]
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	Toxic, corrosive, radioactive[3]
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). Y verify (what is YN ?) Infobox references

Uranium hexafluoride, sometimes called hex, is an inorganic compound with the formula UF₆. Uranium hexafluoride is a volatile and toxic 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.