Samarium(II) fluoride
(Redirected from Samarium difluoride)
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3D model (JSmol)
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PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| SmF2 | |
| Structure[1] | |
| Fluorite structure | |
| Fm3m (No. 225) | |
a = 587.10 pm
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Formula units (Z)
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4 |
| Related compounds | |
Other anions
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Samarium(II) chloride Samarium(II) bromide Samarium(II) iodide |
Other cations
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Europium(II) fluoride Thulium(II) fluoride Ytterbium(II) fluoride |
Related compounds
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Samarium(III) fluoride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Samarium(II) fluoride is one of fluorides of samarium with a chemical formula SmF2. The compound crystalizes in the fluorite structure, and is significantly nonstoichiometric. Along with europium(II) fluoride and ytterbium(II) fluoride, it is one of three known rare earth difluorides, the rest are unstable.[1]
Preparation
[edit | edit source]Samarium(II) fluoride can be prepared by using samarium or hydrogen gas to reduce samarium(III) fluoride:[2]
- 2 SmF3 + Sm → 3 SmF2
- 2 SmF3 + H2 → 2 SmF2 + 2 HF
Properties
[edit | edit source]Samarium(II) fluoride is a purple to black solid. This is present in the crystal structure of the cubic calcium fluoride type (space group Fm3m; No. 225 with a = 587.7 pm).[3][2][4]
References
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