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;
ECHA InfoCard	100.033.956
EC Number	237-367-3;
PubChem CID	83714;
CompTox Dashboard (EPA)	DTXSID8065616 ;
	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	1306 °C
Boiling point	2427 °C
Solubility in water	Soluble
Structure
Crystal structure	Orthorombic, oP16, SpaceGroup = Pnma, No. 62
Related compounds
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). 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 = 6.669, b = 7.059, c = 4.405 (.10^-1 nm). Above 495 °C, it has the rhombohedral LaF₃ structure (space group P3cl) - with lattice constants a = 7.07, c = 7.24 (.10^-1 nm).^[1]

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

References

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

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

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