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Yttrium(III) fluoride

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Yttrium(III) fluoride
Yttrium(III) fluoride
Other names
yttrium trifluoride
3D model (JSmol)
ECHA InfoCard 100.033.855 Edit this at Wikidata
EC Number
  • 237-257-5
  • InChI=1S/3FH.Y/h3*1H;/q;;;+3/p-3 checkY
  • InChI=1/3FH.Y/h3*1H;/q;;;+3/p-3
  • F[Y](F)F
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 acid soluble
1.51 (500 nm)
Orthorhombic, oP16, SpaceGroup = Pnma, No. 62
GHS labelling:
GHS07: Exclamation mark
H302, H312, H315, H319, H332, H335
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).
checkY verify (what is checkY☒N ?)

Yttrium(III) fluoride is an inorganic chemical compound with the chemical formula Y F3. 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]


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

Y(OH)3 + 3HF → YF3 + 3H2O


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[edit]

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.


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


  1. ^ Dinér, Peter (February 2016). "Yttrium from Ytterby". Nature Chemistry. 8 (2): 192. Bibcode:2016NatCh...8..192D. doi:10.1038/nchem.2442. ISSN 1755-4349. PMID 26791904.
  2. ^ "Tiny particles produce huge photon avalanches". Physics World. 2021-01-21. Archived from the original on 2022-01-19. Retrieved 2021-06-11.
  3. ^ SCHENK, P.W.; BRAUER, G. (1963), "Preparative Methods", Handbook of Preparative Inorganic Chemistry, Elsevier, pp. 3–107, doi:10.1016/b978-0-12-395590-6.50008-9, ISBN 978-0-12-395590-6, archived from the original on 2024-03-05, retrieved 2023-12-24
  4. ^ "General Reserch Institute Nonferrous Metals". 2007-09-28. Archived from the original on 2007-09-28. Retrieved 2023-12-24.
  5. ^ Cheetham, A. K.; Norman, N.; Hope, Håkon; Kjekshus, Arne; Klewe, Bernt; Powell, D. L. (1974). "The Structures of Yttrium and Bismuth Trifluorides by Neutron Diffraction". Acta Chemica Scandinavica. 28a: 55–60. doi:10.3891/acta.chem.scand.28a-0055. ISSN 0904-213X.
  6. ^ "Waimirite-(Y): Mineral information, data and localities". Archived from the original on 2022-01-11. Retrieved 2017-03-10.
  7. ^ "Yttrium Fluoride, YF3 - For Optical Coating" (PDF). Archived from the original (PDF) on 2010-07-05. Retrieved 2023-12-24.
  8. ^ "Yttrium Fluoride 99%-99.999% from Metall Rare Earth Limited". www.metall.com.cn. Archived from the original on 2023-12-24. Retrieved 2023-12-24.