Samarium - Materials / Alfa Chemistry

NAVIGATION

Samarium

PRICE INQUIRY

Catalog Number

ACMA00014366

Product Name

Samarium

Category

Glass Additives

IUPAC Name

samarium

Molecular Weight

150.4g/mol

Molecular Formula

Canonical SMILES

[Sm]

InChI

InChI=1S/Sm

InChI Key

KZUNJOHGWZRPMI-UHFFFAOYSA-N

Boiling Point

1794 °C

Melting Point

1072 °C

Density

7.52 g cu cm at 25 °C

Application

Samarium is a versatile element with various applications, primarily due to its properties as a neutron absorber and its role as a component in advanced materials. In chemical reactions, samarium, when combined with titanium(IV) chloride, effectively reduces arylsulfonyl chlorides and arylsulfinates to form diaryl disulfides. This soft, silvery-grey metallic element, belonging to the lanthanoids, is notable for its use in special alloys essential for nuclear reactor parts due to its neutron-absorbing capabilities. Additionally, samarium is employed as a dopant in laser crystals and in producing ferromagnetic alloys, like SmCo5, which yield exceptionally strong permanent magnets. Furthermore, samarium oxide finds applications in special optical glasses. First discovered by François Lecoq de Boisbaudran in 1879, samarium continues to be pivotal in various technological advancements.

Color/Form

Silvery metal; rhombohedral

Complexity

Covalently-Bonded Unit Count

EC Number

231-128-7

Exact Mass

151.91974g/mol

Formal Charge

Heavy Atom Count

MeSH Entry Terms

Samarium

Monoisotopic Mass

151.91974g/mol

Other Experimental

Samarium has high thermal neutron capture cross section ... has a low rate of burn off when used in control rods or in ceramics for radiation protection;Reasonably stable in air;Three crystal modifications of the metal exit, eith transformations at 734 and 922 °C;Ignites in air at 150 °C;Specific heat capacity at 298 K, J-mol/K: 29.6; linear coefficient of expansion, 10-6/K: 10.4; thermal conductivity W/cm/K: 0.133; Vickers hardness: 45; Modulus of elasticity, 10+10 N/sq m: 5.75; Shear modulus, 10+10 N/sq m:1.26;Poisson's ratio: 0.352; Grueneisen constant for temperature dependence of electrical resistivity: 0.63; Electrical resistivity, microohlm/cm: 94; Electrion emission, eV: 2.7-2.8; crystal structure of stable phase at room temperature; Lattice constants, nm: 0.3621 (a); 2.625 (c); Distillation rate: 83 g-sq cm/hr at 1.3X10-3 bar;33 isotopes and isomers of samarium ... natural samarium is a mixture of seven isotopes, three of which are unstable but have long half-lives;Samarium-147 and -148 are naturally occurring and stable. Samarium-129 through -143 and samarium-155 through -162 are artificially produced and are radioactive.

Rotatable Bond Count

UNII

42OD65L39F

Vapor Pressure

1.3X10-5 bar at 722 mm Hg; 1.3X10-3 bar at 964 mm Hg

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