Worlds of David Darling
Encyclopedia of Science
   
Home > Encyclopedia of Science

samarium (Sm)





samarium
Distilled, crystalline samarium.
Image copyright: smart-elements.com

A gray-white metallic element of the lanthanide series, first identified spectroscopically in 1879. Its chief ores are monazite and bastnaesite. Samarium is used in carbon-arc lamps, as a moderator in nuclear reactors, and as a catalyst. Some samarium alloys are used for making powerful permanent magnets. Samarium's most common isotope is 152Sm (26.72%).


atomic number 62
relative atomic mass 150.35
relative density 7.52
melting point 1,072°C (1,962°F)
boiling point 3,791°C (3,256°F)


Related category

   • INORGANIC CHEMISTRY