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samarium (Sm)
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
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