Names | |
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IUPAC name
Cerium(III) fluoride
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Other names
Cerium trifluoride
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Identifiers | |
ECHA InfoCard | 100.028.947 |
PubChem CID
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UNII | |
CompTox Dashboard (EPA)
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Properties | |
CeF3 | |
Molar mass | 197.12 g/mol |
Density | 6.16 g/cm3 (at 20 °C) |
Melting point | 1,460 °C (2,660 °F; 1,730 K)[1] |
Related compounds | |
Related compounds
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Lanthanum trifluoride |
Hazards | |
GHS labelling: | |
NFPA 704 (fire diamond) | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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.[2][3] CeF3 may be used as a Faraday rotator material in the visible, near-infrared and mid-infrared spectral range.[4][5]
The crystal structure of cerium(III) fluoride is described as the LaF3 or tysonite structure.[6] It contains 9-coordinate cerium ions that adopt an approximately tricapped trigonal prismatic coordination geometry,[7] although it can be considered 11-coordinate if two more distant fluorides are considered part of the cerium coordination environment.[6] The three crystallographically independent fluoride ions are 3-coordinate and range in geometry from trigonal planar to pyramidal.[6]
Cerium coordination | Fluorine F1 coordination | Fluorine F2 coordination | Fluorine F3 coordination |
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Cerium(II) | |||
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Cerium(III) |
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Cerium(III,IV) |
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Cerium(IV) |
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