Cerium(III) fluoride
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| ImageFile1 = Cerium(III) fluoride.jpg
| ImageFile2 = Cerium(III)-fluoride-xtal-3D-bs-17.png
| ImageClass2 = bg-transparent
| ImageName =
| IUPACName = Cerium(III) fluoride
| OtherNames = Cerium trifluoride
|Section1={{Chembox Identifiers
| CASNo_Ref = {{cascite|correct|CAS}}
| CASNo = 7758-88-5
| ChemSpiderID = 22865
| EC_number = 231-841-3
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = 1GCT2G09AN
| PubChem = 24457
}}
|Section2={{Chembox Properties
| Formula = CeF3
| MolarMass = 197.12 g/mol
| Density = 6.16 g/cm3 (at 20 °C)
| MeltingPtC = 1460
| MeltingPt_ref = Holleman-Wiberg, 102. edition, p. 1942{{Full citation needed|date=February 2017}}
}}
|Section8={{Chembox Related
| OtherCompounds = Lanthanum trifluoride}}
|Section9={{Chembox Hazards
|GHSPictograms = {{GHS07}}{{GHS09}}
|NFPA-H = 3
|NFPA-F = 0
|NFPA-R = 0}}
}}
Cerium(III) fluoride (or cerium trifluoride), CeF3, is an ionic compound of the rare earth metal cerium and fluorine.
It appears as a mineral in the form of fluocerite-(Ce) - a very rare mineral species related mainly to pegmatites and rarely to oxidation zones of some polymetallic ore deposits.{{Cite web|url=https://www.mindat.org/min-1567.html|title=Fluocerite-(Ce)}}{{Cite web|url=https://www.ima-mineralogy.org/Minlist.htm|title=List of Minerals|date=21 March 2011}} CeF3 may be used as a Faraday rotator material in the visible, near-infrared and mid-infrared spectral range.{{cite journal |last1=Vojna |first1=David |last2=Yasuhara |first2=Ryo |last3=Slezák |first3=Ondřej |last4=Mužík |first4=Jiří |last5=Lucianetti |first5=Antonio |last6=Mocek |first6=Tomáš |title=Verdet constant dispersion of CeF3 in the visible and near-infrared spectral range |journal=Optical Engineering |date=2017 |volume=56 |issue=6 |pages=067105 |doi=10.1117/1.oe.56.6.067105 |bibcode=2017OptEn..56f7105V |s2cid=125990210 |url=https://www.researchgate.net/publication/317486975}}{{cite journal |last1=Vojna |first1=David |last2=Slezák |first2=Ondřej |last3=Yasuhara |first3=Ryo |last4=Furuse |first4=Hiroaki |last5=Lucianetti |first5=Antonio |last6=Mocek |first6=Tomáš |title=Faraday Rotation of Dy2O3, CeF3 and Y3Fe5O12 at the Mid-Infrared Wavelengths |journal=Materials |date=2020 |volume=13 |issue=23 |page=5324 |doi=10.3390/ma13235324 |pmid=33255447 |pmc=7727863 |bibcode=2020Mate...13.5324V |doi-access=free }}
Structure
The crystal structure of cerium(III) fluoride is described as the Lanthanum trifluoride or tysonite structure.{{ cite book | first1 = A. F. | last1 = Wells | title = Structural Inorganic Chemistry | edition = 5th | year = 1984 | publisher = Oxford University Press | isbn = 978-0-19-965763-6 | pages = 420–421 }} It contains 9-coordinate cerium ions that adopt an approximately tricapped trigonal prismatic coordination geometry,{{Greenwood&Earnshaw2nd|pages=1240–1241}} although it can be considered 11-coordinate if two more distant fluorides are considered part of the cerium coordination environment. The three crystallographically independent fluoride ions are 3-coordinate and range in geometry from trigonal planar to pyramidal.
| class="wikitable" style="margin:1em auto; text-align:center;"
|+Coordination in cerium(III) fluoride{{ cite journal | title = A powder neutron diffraction study of lanthanum and cerium trifluorides | first1 = A. K. | last1 = Cheetham | authorlink1 = Anthony Cheetham | first2 = B. E. F. | last2 = Fender | first3 = H. | last3 = Fuess | first4 = A. F. | last4 = Wright | journal = Acta Crystallogr. B | year = 1976 | volume = 32 | pages = 94–97 | doi = 10.1107/S0567740876002380}} |
| Cerium coordination
! Fluorine F1 coordination ! Fluorine F2 coordination ! Fluorine F3 coordination |
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References
{{reflist}}
{{Cerium compounds}}
{{fluorides}}
{{Lanthanide halides}}