Samarium(III) fluoride

Samarium(III) fluoride

Names
IUPAC name Samarium(III) fluoride
Other names Samarium trifluoride, Trifluorosamarium
Identifiers
CAS Number	13765-24-7
ChemSpider	75536
EC Number	237-367-3
Jmol interactive 3D	Image
PubChem	83714
InChI InChI=1S/3FH.Sm/h3*1H;/q;;;+3/p-3 Key: OJIKOZJGHCVMDC-UHFFFAOYSA-K InChI=1/3FH.Sm/h3*1H;/q;;;+3/p-3 Key: OJIKOZJGHCVMDC-DFZHHIFOAV
SMILES F[Sm](F)F
Properties
Chemical formula	SmF3
Molar mass	207.36 g/mol
Appearance	Yellow odorless powder
Density	6.6 g/cm^3 at 20 °C
Melting point	1,306 °C (2,383 °F; 1,579 K)
Boiling point	2,427 °C (4,401 °F; 2,700 K)
Solubility in water	Insoluble
Structure
Crystal structure	Orthorombic, oP16, SpaceGroup = Pnma, No. 62
Related compounds
Related compounds	Samarium(II) fluoride Samarium(III) chloride Samarium(III) bromide Samarium(III) iodide
Hazards
R-phrases	R20/21/22, R36/37/38
S-phrases	S9, S26, S36/37
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Samarium(III) fluoride (SmF₃) is a slightly hygroscopic solid fluoride. At room temperature, it has orthorhombic structure with space group Pnma – β-YF₃ type with lattice constants a = 666,9 pm, b = 705,9 pm, c = 440,5 pm. Above 495 °C, it has the rhombohedral LaF₃ structure (space group P3cl) – with lattice constants a = 707, c = 724 pm.^[1]

Conditions/substances to avoid are: open flame, moisture, strong acids.

References

1. K Rotereau et al.: The high-temperature phase transition in samarium fluoride, SmF₃: structural and vibrational investigation, J. Phys.: Condens. Matter, 1998, 10, 1431–1446, doi:10.1088/0953-8984/10/6/026.