Samaryum
62
Sm
Grup
yok
Periyot
6
Blok
f
Protonlar
Elektronlar
Nötronlar
62
62
88
Temel Özellikleri
Atom numarası
62
Atom ağırlığı
150,36
Kütle Numarası
150
Kategori
Lantanit
Renk
Gümüşi
Radyoaktif
Hayir
From samarskite, a mineral named after Russian mine official, Col. Samarski
Kristal yapısı
Basit trigonal
Tarihi
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.
Enerji seviyesi başına Elektronlar
2, 8, 18, 24, 8, 2
Elektron dizilimi
[Xe] 4f6 6s2
Samarium metal can be produced by reducing the oxide with lanthanum
Fiziksel Özellikleri
Faz
Katı
Yoğunluk
7,52 g/cm3
Ergime noktası
1345,15 K | 1072 °C | 1961,6 °F
Kaynama noktası
2067,15 K | 1794 °C | 3261,2 °F
Ergime ısısı
8,6 kJ/mol
Buharlaşma ısısı
175 kJ/mol
Isı kapasitesi
0,197 J/g·K
Dünya kabuğundaki bulunulabilirliği
0,0006%
Evrendeki bulunulabilirliği
5×10-7%
CAS Numarası
7440-19-9
PubChem CID Numarası
23951
Atom Özellikleri
Atom yarıçapı
180 pm
Kovalent yarıçapı
198 pm
Elektronegatifliği
1,17 (Pauling ölçeği)
İyonlaşma enerjisi
5,6437 eV
Atomik Hacim
20,0 cm3/mol
Isıl iletkenlik
0,133 W/cm·K
Yükseltgenme seviyeleri
2, 3
Uygulamalar
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
İzotoplar
Kararlı izotoplar
144Sm, 149Sm, 150Sm, 152Sm, 154SmKararsız izotoplar
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