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samarium

File:Samarium-2.jpg · Wikimedia Commons · See Wikimedia Commons

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samarium

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Also known as Sm, element 62, 62Sm

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.

OverviewAI-generated

Samarium is a chemical element with the symbol Sm and atomic number 62. It was discovered in 1879. The element has a mass of 150.36 and an electronegativity of 1.17. Its ionic radius is 1.27. The chemical formula is Sm, and its canonical SMILES representation is [Sm]. The Unicode character for samarium is 釤.

In chemical databases, samarium is identified by the CID 23951 and the InChIKey KZUNJOHGWZRPMI-UHFFFAOYSA-N. Its molecular weight is listed as 150.4. The compound has a topological polar surface area of 0 and carries a charge of 0. It has zero hydrogen bond donors and acceptors.

Medical literature references the element in 2666 PubMed articles. Additionally, samarium is referenced by 862 other encyclopedia articles.

Synthesized by Vinony from 23 facts across 4 sources: Wikidata, PubChem, PubMed, Vinony graph. Generated from structured data (not the Wikipedia text) and checked against those facts — may still contain errors.

Chemical data

Formula
Sm
Molecular weight
150.4 g/mol
IUPAC name
samarium
SMILES
[Sm]
InChIKey
KZUNJOHGWZRPMI-UHFFFAOYSA-N
Polar surface area
0 Ų
H-bond donors
0
H-bond acceptors
0
Formal charge
0

via PubChem

Research

2,666 papers

via PubMed

Wikidata facts

Instance of
chemical element
Part of
period 6
Named after
samarskite-(Y)
Material used
spent nuclear fuel
Mass
150.36
Image
Samarium 1.jpg
Show 15 more facts
element symbol
Sm
Commons category
Samarium
discoverer or inventor
Paul-Émile Lecoq de Boisbaudran
topic's main category
Category:Samarium
atomic number
62
time of discovery or invention
1879-01-01
location of discovery
Paris
Commons gallery
Samarium
canonical SMILES
[Sm]
chemical formula
Sm
Unicode character
釤
electronegativity
1.17
different from
Samar
ionic radius
1.24
on focus list of Wikimedia project
Wikipedia:Vital articles/Level/4
Sources (6)

via Wikidata · CC0

~32 min read

Encyclopedic overview

25 sections
Contents
  • 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.

Excerpted from Wikipedia’s “samarium” article, available under the CC BY-SA 4.0 licence.

Gallery (23)

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