Samarium
62
Sm
Groep
n/a
Periode
6
Blok
f
Protrone
Elektrone
Neutrone
62
62
88
Algemene Eienskappe
Atoom Nommer
62
Atoommassa
150,36
Massa Nommer
150
Kategorie
Lantaniede
Kleur
Silver
Radioaktief
Nee
From samarskite, a mineral named after Russian mine official, Col. Samarski
Kristalstruktuur
Eenvoudige Trigonaal
Geskiendenis
In 1853, Jean Charles Galissard de Marignac discovered samarium when he found lines in mineral spectra.
Paul Émile Lecoq de Boisbaudran isolated a samarium salt in Paris in 1879 from the mineral samarskite and identified a new element in it via sharp optical absorption lines.
The pure element was produced only in 1901 by Eugène-Anatole Demarçay.
Paul Émile Lecoq de Boisbaudran isolated a samarium salt in Paris in 1879 from the mineral samarskite and identified a new element in it via sharp optical absorption lines.
The pure element was produced only in 1901 by Eugène-Anatole Demarçay.
Elektrone per skil
2, 8, 18, 24, 8, 2
Elektronkonfigurasie
[Xe] 4f6 6s2
Samarium metal can be produced by reducing the oxide with lanthanum
Fisiese Eienskappe
Fase
Soliede
Digtheid
7,52 g/cm3
Smeltpunt
1345,15 K | 1072 °C | 1961,6 °F
Kookpunt
2067,15 K | 1794 °C | 3261,2 °F
Heat of Fusion
8,6 kJ/mol
Heat of Vaporization
175 kJ/mol
Spesifieke Hitte Kapasiteit
0,197 J/g·K
Oorvloed in die aardkors
0,0006%
Oorvloed in die heelal
5×10-7%
CAS Nommer
7440-19-9
PubChem CID Nommer
23951
Atomiese Eienskappe
Atoom radius
180 pm
Kovalente Radius
198 pm
Elektronegatiewiteit
1,17 (Pauling scale)
Ionisasie potensiaal
5,6437 eV
Atoom volume
20,0 cm3/mol
Termiese geleidingsvermoë
0,133 W/cm·K
Oksidasiestate
2, 3
Toepassings
Samarium's main use is in samarium-cobalt alloy magnets for headphones, small motors and pickups for some electric guitars.
Radioactive samarium-153 is used to kill cancer cells in the treatment of lung cancer, prostate cancer, breast cancer and osteosarcoma.
Samarium and its compounds are also used as catalyst and chemical reagent.
Radioactive samarium-153 is used to kill cancer cells in the treatment of lung cancer, prostate cancer, breast cancer and osteosarcoma.
Samarium and its compounds are also used as catalyst and chemical reagent.
Samarium is considered to be moderately toxic
Isotope
Stabiele Isotope
144Sm, 149Sm, 150Sm, 152Sm, 154SmOnstabiele Isotope
128Sm, 129Sm, 130Sm, 131Sm, 132Sm, 133Sm, 134Sm, 135Sm, 136Sm, 137Sm, 138Sm, 139Sm, 140Sm, 141Sm, 142Sm, 143Sm, 145Sm, 146Sm, 147Sm, 148Sm, 151Sm, 153Sm, 155Sm, 156Sm, 157Sm, 158Sm, 159Sm, 160Sm, 161Sm, 162Sm, 163Sm, 164Sm, 165Sm