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 the inorganic compound with the formula U F₆. Uranium hexafluoride is a volatile, white solid that is used in enriching uranium for nuclear reactors and nuclear weapons.

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/h61H;/q;;;;;;+6/p-6^Y Key: SANRKQGLYCLAFE-UHFFFAOYSA-H^Y 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 (O_h)
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 (Δ_fH^⦵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). Y verify (what is ^YN ?) Infobox references