Samarium(II) fluoride

Last updated
Samarium(II) fluoride
Identifiers
3D model (JSmol)
ChemSpider
PubChem CID
  • InChI=1S/2FH.Sm/h2*1H;/p-2
    Key: PBDMHCPVUGOGTK-UHFFFAOYSA-L
  • [F-].[F-].[Sm]
Properties
SmF2
Structure [1]
Fluorite structure
Fm3m (No. 225)
a = 587.10 pm
4
Related compounds
Other anions
Samarium(II) chloride
Samarium(II) bromide
Samarium(II) iodide
Other cations
Europium(II) fluoride
Thulium(II) fluoride
Ytterbium(II) fluoride
Related compounds
 Samarium(III) fluoride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

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]

Contents

Preparation

Samarium(II) fluoride can be prepared by using samarium or hydrogen gas to reduce samarium(III) fluoride: [2]

Properties

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]

Related Research Articles

<span class="mw-page-title-main">Samarium</span> Chemical element, symbol Sm and atomic number 62

Samarium is a chemical element; it has symbol Sm and atomic number 62. It is a moderately hard silvery metal that slowly oxidizes in air. Being a typical member of the lanthanide series, samarium usually has the oxidation state +3. Compounds of samarium(II) are also known, most notably the monoxide SmO, monochalcogenides SmS, SmSe and SmTe, as well as samarium(II) iodide.

<span class="mw-page-title-main">Cubic crystal system</span> Crystallographic system where the unit cell is in the shape of a cube

In crystallography, the cubiccrystal system is a crystal system where the unit cell is in the shape of a cube. This is one of the most common and simplest shapes found in crystals and minerals.

<span class="mw-page-title-main">Copper(II) fluoride</span> Chemical compound

Copper(II) fluoride is an inorganic compound with the chemical formula CuF2. The anhydrous form is a white, ionic, crystalline, hygroscopic salt with a distorted rutile-type crystal structure, similar to other fluorides of chemical formulae MF2 (where M is a metal). The dihydrate, CuF2·2H2O, is blue in colour.

<span class="mw-page-title-main">Samarium(III) fluoride</span> Chemical compound

Samarium(III) fluoride (SmF3) is a slightly hygroscopic solid fluoride. Conditions/substances to avoid are: open flame, moisture, strong acids.

<span class="mw-page-title-main">Uranium trifluoride</span> Chemical compound

Uranium trifluoride is an inorganic chemical compound with the chemical formula UF3.

<span class="mw-page-title-main">Promethium(III) fluoride</span> Chemical compound

Promethium(III) fluoride or promethium trifluoride is a salt of promethium and fluorine with the formula PmF3.

Neptunium(III) fluoride or neptunium trifluoride is a salt of neptunium and fluorine with the formula NpF3.

<span class="mw-page-title-main">Neptunium(IV) fluoride</span> Chemical compound

Neptunium(IV) fluoride or neptunium tetrafluoride is a inorganic compound with the formula NpF4. It is a green salt and is isostructural with UF4.

Neptunium(V) fluoride or neptunium pentafluoride is a chemical compound of neptunium and fluorine with the formula NpF5.

<span class="mw-page-title-main">Fluorocarbonate</span> Class of chemical compounds

A carbonate fluoride, fluoride carbonate, fluorocarbonate or fluocarbonate is a double salt containing both carbonate and fluoride. The salts are usually insoluble in water, and can have more than one kind of metal cation to make more complex compounds. Rare-earth fluorocarbonates are particularly important as ore minerals for the light rare-earth elements lanthanum, cerium and neodymium. Bastnäsite is the most important source of these elements. Other artificial compounds are under investigation as non-linear optical materials and for transparency in the ultraviolet, with effects over a dozen times greater than Potassium dideuterium phosphate.

<span class="mw-page-title-main">Cerium(IV) fluoride</span> Chemical compound

Cerium(IV) fluoride is an inorganic compound with a chemical formula CeF4. It is a strong oxidant that appears as a white crystalline material. Cerium(IV) fluoride has an anhydrous form and a monohydrate form.

Europium(II) fluoride is an inorganic compound with a chemical formula EuF2. It was first synthesized in 1937.

<span class="mw-page-title-main">Rubidium sulfide</span> Chemical compound

Rubidium sulfide is an inorganic compound and a salt with the chemical formula Rb2S. It is a white solid with similar properties to other alkali metal sulfides.

Curium compounds are compounds containing the element curium (Cm). Curium usually forms compounds in the +3 oxidation state, although compounds with curium in the +4, +5 and +6 oxidation states are also known.

<span class="mw-page-title-main">Europium compounds</span> Compounds with at least one europium atom

Europium compounds are compounds formed by the lanthanide metal europium (Eu). In these compounds, europium generally exhibits the +3 oxidation state, such as EuCl3, Eu(NO3)3 and Eu(CH3COO)3. Compounds with europium in the +2 oxidation state are also known. The +2 ion of europium is the most stable divalent ion of lanthanide metals in aqueous solution. Many europium compounds fluoresce under ultraviolet light due to the excitation of electrons to higher energy levels. Lipophilic europium complexes often feature acetylacetonate-like ligands, e.g., Eufod.

Samarium compounds are compounds formed by the lanthanide metal samarium (Sm). In these compounds, samarium generally exhibits the +3 oxidation state, such as SmCl3, Sm(NO3)3 and Sm(C2O4)3. Compounds with samarium in the +2 oxidation state are also known, for example SmI2.

Ytterbium compounds are chemical compounds that contain the element ytterbium (Yb). The chemical behavior of ytterbium is similar to that of the rest of the lanthanides. Most ytterbium compounds are found in the +3 oxidation state, and its salts in this oxidation state are nearly colorless. Like europium, samarium, and thulium, the trihalides of ytterbium can be reduced to the dihalides by hydrogen, zinc dust, or by the addition of metallic ytterbium. The +2 oxidation state occurs only in solid compounds and reacts in some ways similarly to the alkaline earth metal compounds; for example, ytterbium(II) oxide (YbO) shows the same structure as calcium oxide (CaO).

<span class="mw-page-title-main">Ytterbium(II) fluoride</span> Chemical compound

Ytterbium(II) fluoride is a binary inorganic compound of ytterbium and fluorine with the chemical formula YbF2.

<span class="mw-page-title-main">Samarium(III) phosphate</span> Chemical compound

Samarium(III) phosphate is an inorganic compound, with the chemical formula of SmPO4. It is one of the phosphates of samarium.

<span class="mw-page-title-main">Samarium(III) antimonide</span> Chemical compound

Samarium antimonide is a binary inorganic compound of samarium and antimony with the formula SmSb. It forms crystals.

References

  1. 1 2 Greis, Ortwin; Haschke, John M. (1982). "Chapter 45 Rare earth fluorides". Handbook on the Physics and Chemistry of Rare Earths Volume 5. Vol. 5. Elsevier. pp. 387–460. doi:10.1016/s0168-1273(82)05008-9. ISBN   9780444863751. ISSN   0168-1273.
  2. 1 2 Georg Brauer (Hrsg.), unter Mitarbeit von Marianne Baudler u. a.: Handbuch der Präparativen Anorganischen Chemie. 3., umgearbeitete Auflage. Band I, Ferdinand Enke, Stuttgart 1975, ISBN   3-432-02328-6, S. 255.
  3. ↑ Ans, Jean d'; Lax, Ellen (1998). Taschenbuch für Chemiker und Physiker (in German). Springer. ISBN   978-3-540-60035-0.
  4. ↑ "mp-1206711: SmF2 (Cubic, Fm-3m, 225)". Materials Project. Retrieved 2023-12-22.


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