Yttrium(III) fluoride

Yttrium(III) fluoride is an inorganic chemical compound with the chemical formula YF₃. It is not known naturally in "pure" form. The fluoride minerals containing essential yttrium include tveitite-(Y) (Y,Na)₆Ca₆Ca₆F₄₂ and gagarinite-(Y) NaCaY(F,Cl)₆. Sometimes mineral fluorite contains admixtures of yttrium.^[1][2]

Yttrium(III) fluoride

Yttrium(III) fluoride
Names
Other names yttrium trifluoride
Identifiers
CAS Number	13709-49-4 Y
3D model (JSmol)	Interactive image
ChemSpider	75502 Y
ECHA InfoCard	100.033.855
EC Number	237-257-5
PubChem CID	83679
UNII	V8QS7WES60 Y
CompTox Dashboard (EPA)	DTXSID2065595
InChI InChI=1S/3FH.Y/h3*1H;/q;;;+3/p-3 Y Key: RBORBHYCVONNJH-UHFFFAOYSA-K Y InChI=1/3FH.Y/h3*1H;/q;;;+3/p-3 Key: RBORBHYCVONNJH-DFZHHIFOAP
SMILES F[Y](F)F
Properties
Chemical formula	YF3
Molar mass	145.90 g mol−1
Appearance	white powder
Density	4.01 g cm−3
Melting point	1,387 °C (2,529 °F; 1,660 K)
Boiling point	2,230 °C (4,050 °F; 2,500 K)
Solubility in water	insoluble
Solubility in acid	soluble
Refractive index (nD)	1.51 (500 nm)
Structure
Crystal structure	Orthorhombic, oP16, SpaceGroup = Pnma, No. 62
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H302, H312, H315, H319, H332, H335
Precautionary statements	P261, P264, P270, P271, P280, P301+P312, P302+P352, P304+P312, P304+P340, P305+P351+P338, P312, P321, P322, P330, P332+P313, P337+P313, P362, P363, P403+P233, P405, P501
Flash point	Non-flammable
Related compounds
Other anions	Yttrium(III) chloride Yttrium(III) bromide Yttrium(III) iodide
Other cations	Scandium(III) fluoride Lutetium(III) 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

Synthesis

YF₃ can be produced by reacting fluorine with yttria or yttrium hydroxide with hydrofluoric acid.^[3]

Y(OH)₃ + 3HF → YF₃ + 3H₂O

Properties

Yttrium(III) fluoride has a refractive index of 1.51 at 500 nm^[4] and is transparent in the range from 193 nm to 14,000 nm (i.e. from the UV to IR range).

Pure yttrium can be obtained from yttrium(III) fluoride by reduction with calcium.

Yttrium(III) fluoride crystallizes in the orthorhombic crystal system, with space group Pnma (space group no. 62), with the lattice parameters a = 6.3537 Å, b = 6.8545 Å, c = 4.3953 Å.^[5] Yttrium is nine times coordinated by fluorine atoms.

Occurrence and uses

It occurs as the mineral waimirite-(Y).^[6]

Yttrium(III) fluoride can be used for the production of metallic yttrium,^[7] thin films, glasses^[8] and ceramics.

Hazards

Conditions/substances to avoid are: acids, active metals and moisture.