samarium
Sign in to saveSamarium is a chemical element; it has symbol Sm and atomic number 62. It is a moderately hard silvery metal that slowly oxidizes in air. Being a typical member of the lanthanide series, samarium usually has the oxidation state +3. Compounds of samarium(II) are also known, most notably the monoxide SmO, monochalcogenides SmS, SmSe and SmTe, as well as samarium(II) iodide.
AI overview
Samarium is a silvery metal and chemical element (symbol Sm) that belongs to a special group of elements called lanthanides and typically exists in a +3 oxidation state, though it can also form compounds in a +2 state. It's a moderately hard metal that gradually reacts with oxygen in air, making it useful in various chemical compounds and applications.
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Article
25 sectionsContents
- Physical properties
- Chemical properties
- Compounds
- Oxides
- Chalcogenides
- Halides
- Borides
- Samarium hexaboride
- Other inorganic compounds
- Organometallic compounds
- Isotopes
- History
- Occurrence and production
- Geopolitics
- Applications
- Magnets
- Chemical reagent
- Neutron absorber
- Lasers
- Storage phosphor
- Non-commercial and potential uses
- Biological role and precautions
- References
- Bibliography
- External links
Samarium is a chemical element; it has symbol Sm and atomic number 62. It is a moderately hard silvery metal that slowly oxidizes in air. Being a typical member of the lanthanide series, samarium usually has the oxidation state +3. Compounds of samarium(II) are also known, most notably the monoxide SmO, monochalcogenides SmS, SmSe and SmTe, as well as samarium(II) iodide.
Discovered in 1879 by French chemist Paul-Émile Lecoq de Boisbaudran, samarium was named after the mineral samarskite from which it was isolated. The mineral itself was named after a Russian mine official, Colonel Vassili Samarsky-Bykhovets, who thus became the first person to have a chemical element named after him, though the name was indirect.