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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]

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.

References

  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.
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