Samarium(III) fluoride

Samarium(III) fluoride
Names
	IUPAC name samarium(III) fluoride
	Other names samarium trifluoride; trifluorosamarium
Identifiers
CAS Number	13765-24-7 ;
3D model (JSmol)	Interactive image;
ChemSpider	75536 ;
ECHA InfoCard	100.033.956
EC Number	237-367-3;
PubChem CID	83714;
CompTox Dashboard (EPA)	DTXSID8065616 ;
	InChI InChI=1S/3FH.Sm/h31H;/q;;;+3/p-3 Key: OJIKOZJGHCVMDC-UHFFFAOYSA-K ; InChI=1/3FH.Sm/h31H;/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/cm3 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
Other anions	Samarium(III) chloride; Samarium(III) bromide; Samarium(III) iodide
Other cations	Samarium(II) fluoride
Hazards
R-phrases (outdated)	R20/21/22, R36/37/38
S-phrases (outdated)	S9, S26, S36/37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 (Sm F₃) 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

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.

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[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.