Catalog Number
ACM7440199-1
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;
Molecular Weight
150.36g/mol
InChI Key
KZUNJOHGWZRPMI-UHFFFAOYSA-N;
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.
Color/Form
Silvery metal; rhombohedral;
Covalently-Bonded Unit 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
Vapor Pressure
1.3X10-5 bar at 722 mm Hg; 1.3X10-3 bar at 964 mm Hg;