Samarium(III) fluoride
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]
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Names | |
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IUPAC name
samarium(III) fluoride | |
Other names
samarium trifluoride trifluorosamarium | |
Identifiers | |
3D model (JSmol) |
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ChemSpider | |
ECHA InfoCard | 100.033.956 |
EC Number |
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PubChem CID |
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CompTox Dashboard (EPA) |
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Properties | |
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) |
Insoluble | |
Structure | |
Orthorhombic, oP16, SpaceGroup = Pnma, No. 62 | |
Related compounds | |
Other anions |
Samarium(III) chloride Samarium(III) bromide Samarium(III) iodide |
Other cations |
Samarium(II) fluoride |
Hazards | |
GHS labelling: | |
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Danger | |
H301, H311, H315, H319, H331 | |
P261, P264, P270, P271, P280, P301+P310, P302+P352, P304+P340, P305+P351+P338, P311, P312, P321, P322, P330, P332+P313, P337+P313, P361, P362, P363, P403+P233, P405, P501 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references |
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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