samarium

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 Å²
H-bond donors: 0
H-bond acceptors: 0
Formal charge: 0

via PubChem

Research

2,666 papers

Samarium(II)-iodide-mediated cyclizations in natural product synthesis.ReviewChemical reviews · 2004Edmonds DJ, Johnston D, Procter DJDOI: 10.1021/cr030017a
Samarium for osteoblastic bone metastases and osteosarcoma.ReviewExpert opinion on pharmacotherapy · 2006Anderson PDOI: 10.1517/14656566.7.11.1475
Electrodeposition of Samarium Metal, Alloys, and Oxides: Advances in Aqueous and Non-Aqueous Electrolyte Systems.ReviewInternational journal of molecular sciences · 2025Rudnik EDOI: 10.3390/ijms262211176
Samarium Sm-153 lexidronam for the palliation of bone pain associated with metastases.ReviewCancer · 2000Serafini ANDOI: 10.1002/1097-0142(20000615)88:12+<2934::aid-cncr9>3.0.co;2-s
Samarium lexidronam (153Sm-EDTMP): skeletal radiation for osteoblastic bone metastases and osteosarcoma.ReviewExpert review of anticancer therapy · 2007Anderson P, Nuñez RDOI: 10.1586/14737140.7.11.1517
Samarium diiodide induced ketyl-(het)arene cyclisations towards novel N-heterocycles.ReviewChemical Society reviews · 2011Beemelmanns C, Reissig HUDOI: 10.1039/c0cs00116c
Samarium diiodide mediated reactions in total synthesis.ReviewAngewandte Chemie (International ed. in English) · 2009Nicolaou KC, Ellery SP, Chen JSDOI: 10.1002/anie.200902151
Samarium-153-EDTMP dosimetry.Journal of nuclear medicine : official publication, Society of Nuclear Medicine · 1994Heggie JC

via PubMed

~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

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.