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Sm ( Samarium )

Keterangan

       Samarium is relatively stable in dry air but an oxide coating forms in moist air. The metal ignites in air at 150 °C.

Nama lain (trademark, branding etc.)

Samarium, Samarij, Samarium - s, Samário, Самарий

Spesifikasi Produk

Overview of Samarium
Atomic Number 62
Period 6
Series Lanthanides
Relative Atomic Mass (12C=12.000)  150.36
Boiling Point 2064K 1791°C 3256°F
Melting Point 1345K 1072°C 1962°F
Density/kg m-3  7520 (293K)
Ground State Electron Configuration  [Xe]4f66s2
Electron Affinity(M-M-)/kJ mol-1  -50
Discoverer  P-E Lecoq de Boisbaudran
Discovery Location Paris,French
Discovery Year 1879
Name Origin From the mineral samarskite.

Aplikasi

       Used in carbon-arc lighting, permanent magnets, organic reagents, lasers, alloys, headphones and as an absorber in nuclear reactors.

Bahan Baku

Samarium is a chemical element with symbol Sm and atomic number 62. It is a moderately hard silvery metal that readily oxidizes in air. Being a typical member of the lanthanide series, samarium usually assumes 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. The last compound is a common reducing agent in chemical synthesis. Samarium has no significant biological role and is only slightly toxic.

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  • SAMARIUM
    Samarium, along with other rare earths, is used for carbon-arc lighting for the motion picture industry. SmCo5 has been used in making a new permanent magnet material with the highest resistance to demagnetization of any known material. It is said to have an intrinsic coercive force as high as 2200 kA/m. Samarium oxide has been used in optical glass to absorb the infrared. Samarium is used to dope calcium fluoride crystal for use in optical lasers or lasers. Compounds of the metal act as sensitizers for phosphors excited in the infrared; the oxide exhibits catalytic properties in the dehydration and dehydrogenation of ethyl alcohol. It is used in infrared absorbing glass and as a neutron absorber in nuclear reactors.
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