Aluminium fluoride

Aluminium fluoride
	; Anhydrous AlF3
Names
	Other names Aluminium(III) fluoride; Aluminum trifluoride
Identifiers
CAS Number	7784-18-1 ; 32287-65-3 (monohydrate) ; 15098-87-0 (trihydrate) ;
3D model (JSmol)	monomer: Interactive image; crystal form: Interactive image;
ChEBI	CHEBI:49464 ;
ChemSpider	2039 ;
ECHA InfoCard	100.029.137
PubChem CID	2124;
RTECS number	BD0725000;
UNII	Z77H3IKW94 ;
CompTox Dashboard (EPA)	DTXSID8030712 ;
	InChI InChI=1S/Al.3FH/h;31H/q+3;;;/p-3 Key: KLZUFWVZNOTSEM-UHFFFAOYSA-K ; InChI=1/Al.3FH/h;31H/q+3;;;/p-3 Key: KLZUFWVZNOTSEM-DFZHHIFOAC;
	SMILES monomer: F[Al](F)F; crystal form: F[Al](F[Al]0(F)(F)(F)F)(F[Al]1(F)(F)(F)F)(F[Al]2(F)(F)(F)F)(F[Al]3(F)(F)(F)F)F[Al](F[Al](F[Al]4(F)(F)(F)F)(F[Al]5(F)(F)(F)F)(F[Al]6(F)(F)(F)F)(F0)F)(F[Al](F[Al]7(F)(F)(F)F)(F[Al]8(F)(F)(F)F)(F1)(F4)F)(F[Al](F[Al]9(F)(F)(F)F)(F[Al]0(F)(F)(F)F)(F5)(F7)F)(F[Al](F[Al]1(F)(F)(F)F)(F2)(F8)(F9)F)F[Al](F3)(F6)(F0)(F1)F;
Properties
Chemical formula	AlF3
Molar mass	83.977 g/mol (anhydrous); 101.992 g/mol (monohydrate); 138.023 (trihydrate);
Appearance	Colorless to white crystalline solid
Odor	Odorless
Density	3.10 g/cm3 (anhydrous); 2.17 g/cm3 (monohydrate); 1.914 g/cm3 (trihydrate);
Melting point	1,290 °C (2,350 °F; 1,560 K) (anhydrous) (sublimes)
Solubility in water	5.6 g/L (0 °C); 6.7 g/L (20 °C); 17.2 g/L (100 °C);
Magnetic susceptibility (χ)	−13.4×10−6 cm3/mol
Refractive index (nD)	1.3767 (visible range)
Structure
Crystal structure	Rhombohedral, hR24
Space group	R3c, No. 167
Lattice constant	a = 0.49254 nm, c = 1.24477 nm
Lattice volume (V)	0.261519
Formula units (Z)	6
Thermochemistry
Heat capacity (C)	75.1 J/(mol·K)
Std molar; entropy (S⦵298)	66.5 J/(mol·K)
Std enthalpy of; formation (ΔfH⦵298)	−1510.4 kJ/mol
Gibbs free energy (ΔfG⦵)	−1431.1 kJ/mol
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H301, H302, H314, H315, H319, H335, H361, H372
Precautionary statements	P260, P261, P264, P270, P271, P280, P301+P310, P301+P312, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P310, P312, P321, P330, P332+P313, P337+P313, P362, P363, P403+P233, P405, P501
NFPA 704 (fire diamond)	3 0 0
	NIOSH (US health exposure limits):
PEL (Permissible)	none
REL (Recommended)	2 mg/m3
IDLH (Immediate danger)	N.D.
Safety data sheet (SDS)	InChem MSDS
Related compounds
Other anions	Aluminium chloride; Aluminium bromide; Aluminium iodide;
Other cations	Boron trifluoride; Gallium trifluoride; Indium trifluoride; Thallium trifluoride;
Related compounds	Scandium(III) fluoride; Yttrium(III) fluoride; Lutetium(III) fluoride; Lanthanum(III) fluoride; Cerium(III) fluoride; Actinium(III) 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

Aluminium fluoride is an inorganic compound with the formula Al F₃. It forms hydrates AlF₃·xH₂O. Anhydrous AlF₃ and its hydrates are all colorless solids. Anhydrous AlF₃ is used in the production of aluminium. Several occur as minerals.

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