Yttrium(III) fluoride
Chemical compound
From Wikipedia, the free encyclopedia
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]
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| Names | |
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| Other names
yttrium trifluoride | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.033.855 |
| EC Number |
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PubChem CID |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| 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) |
| insoluble | |
| Solubility in acid | soluble |
Refractive index (nD) |
1.51 (500 nm) |
| Structure | |
| Orthorhombic, oP16, SpaceGroup = Pnma, No. 62 | |
| Hazards | |
| GHS labelling: | |
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| Warning | |
| 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).
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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.