Samarium

Catalog Number

ACM7440199-1

Product Name

Samarium

CAS

7440-19-9

Category

Nanoparticles & Nanopowders

Synonyms

Samarium rod, 12.7mm (0.5in) dia; Samarium ingot, 3N; Samarium pieces, 12mm (0.47in) & down; Samarium powder; EINECS 231-128-7; AKOS024438061; Samarium foil, 1.0mm (0.04in) thick; Samarium hydride, 99.9%, - 325 mesh SmH2 -3, Hydrogen level may vary; samarium atom; TRA0016065;

IUPAC Name

samarium;

Molecular Weight

150.36g/mol

Molecular Formula

Sm;

Canonical SMILES

[Sm];

InChI

InChI=1S/Sm;

InChI Key

KZUNJOHGWZRPMI-UHFFFAOYSA-N;

Melting Point

1072 deg C;

Density

7.52 g cu cm at 25 deg C;

Application

Samarium is easy to magnetize, but very difficult to demagnetize. This makes it ideal forthe manufacture of permanent magnets (SmCo5) that are part of the hard disks for computers.Samarium is also used as a neutron absorber in nuclear reactors, as well as for lasers andmetallurgical research. It makes up about 1% of the metals in misch metal, an alloy in cigarettelighter flints. It is also one of several rare-earths used in floodlights and carbon-arc lights usedby the motion picture industry. Samarium is used as a catalyst in several industries, includingthe dehydrogenation of ethanol alcohol.

Storage

water-free area

Color/Form

Silvery metal; rhombohedral;

Covalently-Bonded Unit Count

1

EC Number

231-128-7

Exact Mass

151.92g/mol

Heavy Atom Count

1

Monoisotopic Mass

151.92g/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 deg C;Ignites in air at 150 deg 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.;

pH

Lanthanides /such as samarium/ are thermodynamically defined as hard Lewis acids (weak electron acceptors);

Topological Polar Surface Area

0A^2

UNII

42OD65L39F

Vapor Pressure

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

MSDS

COA

Spec Sheet