Samario
62
Sm
Grupo
Neniu
Perio
6
Bloko
f
Protonoj
Elektronoj
Neŭtronoj
62
62
88
Ĝeneralaj Propraĵoj
Atoma Nombro
62
Atommaso
150,36
Amasa Nombro
150
Kategorio
Lantanoidoj
Koloro
Arĝento
Radioaktiva
Ne
From samarskite, a mineral named after Russian mine official, Col. Samarski
Kristala Strukturo
Simpla Trigono
Historio
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.
Elektronoj per ŝelo
2, 8, 18, 24, 8, 2
Elektrona Agordo
[Xe] 4f6 6s2
Samarium metal can be produced by reducing the oxide with lanthanum
Fizikaj Propraĵoj
Fazo
Solido
Denso
7,52 g/cm3
Fandpunkto
1345,15 K | 1072 °C | 1961,6 °F
Bolpunkto
2067,15 K | 1794 °C | 3261,2 °F
Varmo de Fuzio
8,6 kJ/mol
Varmo de Vaporiĝo
175 kJ/mol
Specifa Varmo Kapacito
0,197 J/g·K
Krusta Abundo
0,0006%
Universa Abundo
5×10-7%
CAS Nombro
7440-19-9
PubChem Kunmetita Identiga Nombro
23951
Atomaj Propraĵoj
Atoma Radiuso
180 pm
Kovalenta Radiuso
198 pm
Elektronegativeco
1,17 (Pauling-skalo)
Potencialo de jonigo
5,6437 eV
Atoma Volumo
20,0 cm3/mol
Termika Kondukto
0,133 W/cm·K
Oksidaj Ŝtatoj
2, 3
Aplikoj
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
Izotopoj
Stabilaj Izotopoj
144Sm, 149Sm, 150Sm, 152Sm, 154SmMalstabilaj Isotopoj
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