Samarium tetraboride

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Samarium tetraboride
YB4structure.jpg
Names
IUPAC name
Samarium tetraboride
Identifiers
3D model (JSmol)
  • InChI=1S/4B.Sm
    Key: IXWQBERMPYCDNG-UHFFFAOYSA-N
  • [Sm].[B].[B].[B].[B]
Properties
SmB4
Molar mass 193.60 g/mol
Density 6.1 g/cm3
Melting point 2,400 °C (4,350 °F; 2,670 K)
Related compounds
Related compounds
 Samarium hexaboride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Samarium tetraboride is a binary inorganic compound of samarium and boron with the formula SmB4. It forms black crystals.

Contents

Preparation

Samarium tetraboride can be prepared from directly reacting samarium and boron at 2400 °C:

Sm + 4B → SmB4

Physical properties

Samarium tetraboride forms crystals of the orthorhombic crystal system, space group P4/mbm, cell parameters a = 0.7174 nm, c = 0.40696 nm, Z = 4, and a structure like thorium tetraboride. [1] [2] [3] [4] [5]

The compound is formed by a peritectic reaction at a temperature of 2400 °C. [1]

At temperatures of 25 K and 7 K, magnetic transitions occur in the compound. [6]

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.

Binary compounds of hydrogen are binary chemical compounds containing just hydrogen and one other chemical element. By convention all binary hydrogen compounds are called hydrides even when the hydrogen atom in it is not an anion. These hydrogen compounds can be grouped into several types.

<span class="mw-page-title-main">Iron boride</span> Chemical compound

Iron boride refers to various inorganic compounds with the formula FexBy. Two main iron borides are FeB and Fe2B. Some iron borides possess useful properties such as magnetism, electrical conductivity, corrosion resistance and extreme hardness. Some iron borides have found use as hardening coatings for iron. Iron borides have properties of ceramics such as high hardness, and properties of metal properties, such as thermal conductivity and electrical conductivity. Boride coatings on iron are superior mechanical, frictional, and anti-corrosive. Iron monoboride (FeB) is a grey powder that is insoluble in water. FeB is harder than Fe2B, but is more brittle and more easily fractured upon impact.

Platinum-samarium is a binary inorganic compound of platinum and samarium with the chemical formula PtSm. This intermetallic compound forms crystals.

Samarium(III) phosphide is an inorganic compound of samarium and phosphorus with the chemical formula SmP.

Samarium(III) arsenide is a binary inorganic compound of samarium and arsenic with the chemical formula SmAs.

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.

UPt<sub>3</sub> Chemical compound

UPt3 is an inorganic binary intermetallic crystalline compound of platinum and uranium.

Samarium(III) molybdate is an inorganic compound, with the chemical formula Sm2(MoO4)3. It is one of the compounds formed by the three elements samarium, molybdenum and oxygen.

<span class="mw-page-title-main">Praseodymium bismuthide</span> Binary inorganic compound of praseodymium and bismuth with the chemical formula of PrBi

Praseodymium bismuthide is a binary inorganic compound of praseodymium and bismuth with the chemical formula of PrBi. It forms crystals.

<span class="mw-page-title-main">Praseodymium antimonide</span> Chemical compound

Praseodymium antimonide is a binary inorganic compound of praseodymium and antimony with the formula PrSb.

<span class="mw-page-title-main">Strontium selenide</span> Chemical compound

Strontium selenide is an inorganic compound with the chemical formula SrSe.

<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.

Terbium monoselenide is an inorganic compound, with the chemical formula of TbSe. It is one of the selenides of terbium. It is a yellow-red solid.

Thulium monoselenide is a mixed valence compound of selenium and thulium with the chemical formula TmSe.

Praseodymium monoselenide is a compound with the chemical formula PrSe. It forms crystals.

Samarium(III) nitride is a binary inorganic compound of samarium and nitrogen with the chemical formula SmN.

Praseodymium pentaphosphide is a binary inorganic compound of praseodymium metal and phosphorus with the chemical formula PrP5.

<span class="mw-page-title-main">Praseodymium hexaboride</span> Chemical compound

Praseodymium hexaboride is a binary inorganic compound of praseodymium and boron with the formula PrB6. It forms black crystals that are insoluble in water.

<span class="mw-page-title-main">Praseodymium tetraboride</span> Chemical compound

Praseodymium tetraboride is a binary inorganic compound of praseodymium and boron with the chemical formula PrB4.

References

  1. 1 2 Диаграммы состояния двойных металлических систем. Vol. 1. М.: Машиностроение. 1996. ISBN   5-217-02688-X.{{cite book}}: Unknown parameter |agency= ignored (help)
  2. ↑ Самсонов Г.В., Серебрякова Т.И., Неронов В.А. (1975). Бориды. М.: Атомиздат.{{cite book}}: CS1 maint: multiple names: authors list (link)
  3. ↑ Predel, B. (2012), Predel, B. (ed.), "B - Sm (Boron - Samarium): phase equilibria, crystallographic and thermodynamic data of binary alloys", B - Ba … Cu - Zr, vol. 12B, Berlin, Heidelberg: Springer Berlin Heidelberg, p. 73, doi:10.1007/978-3-540-44756-6_37, ISBN   978-3-540-44753-5 , retrieved 2024-05-15
  4. ↑ Predel, B. (1992), Madelung, O. (ed.), "B-Sm (Boron-Samarium)", B-Ba – C-Zr, Landolt-Börnstein - Group IV Physical Chemistry, vol. 5b, Berlin/Heidelberg: Springer-Verlag, pp. 1–2, doi:10.1007/10040476_390, ISBN   978-3-540-55115-7 , retrieved 2024-05-15
  5. ↑ Liao, P. K.; Spear, K. E.; Schlesinger, M. E. (Aug 1996). "The B-Sm (boron-samarium) system". Journal of Phase Equilibria. 17 (4): 347–350. doi:10.1007/BF02665562. ISSN   1054-9714.
  6. ↑ Kim, J. Y.; Sung, N. H.; Kang, B. Y.; Kim, M. S.; Cho, B. K.; Rhyee, Jong-Soo (2010-05-01). "Magnetic anisotropy and magnon gap state of SmB4 single crystal". Journal of Applied Physics. 107 (9). doi:10.1063/1.3365061. ISSN   0021-8979.
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