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osmium

File:Osmium_crystals.jpg · Wikimedia Commons · See Wikimedia Commons

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osmium

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Also known as Os, element 76, 76Os

Osmium () is a chemical element; it has symbol Os and atomic number 76. It is a hard, brittle, bluish-white transition metal in the platinum group. Osmium has the highest density of any stable element and one of the lowest abundances in the Earth's crust. Manufacturers use alloys of osmium with platinum, iridium, and other platinum-group metals for fountain pen nib tipping, electrical contacts, and other applications that require extreme durability and hardness.

OverviewAI-generated

Osmium is a chemical element with the symbol Os and atomic number 76. It has an atomic mass of 190.23 and an electron configuration of [Xe] 4f¹⁴ 5d⁶ 6s². The element exhibits an oxidation state of 8 and an electronegativity of 2.2. Its ionic radius is 0.63.

The substance was discovered in 1804. It is represented by the canonical SMILES string [Os] and the Unicode character 鋨. In chemical contexts, it is identified by the formula Os. PubChem lists its CID as 23937 and its IUPAC name as osmium. The compound has a weight of 190.2, a topological polar surface area of 0, and no hydrogen bond donors or acceptors.

Synthesized by Vinony from 25 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
Os
Molecular weight
190.2 g/mol
IUPAC name
osmium
SMILES
[Os]
InChIKey
SYQBFIAQOQZEGI-UHFFFAOYSA-N
Polar surface area
0 Ų
H-bond donors
0
H-bond acceptors
0
Formal charge
0

via PubChem

Research

6,444 papers

via PubMed

~18 min read

Encyclopedic overview

14 sections
Contents
  • Characteristics
  • Physical properties
  • Chemical properties
  • Isotopes
  • History
  • Occurrence
  • Production
  • Applications
  • Precautions
  • Price
  • Notes
  • References
  • Cited sources
  • External links

Osmium () is a chemical element; it has symbol Os and atomic number 76. It is a hard, brittle, bluish-white transition metal in the platinum group. Osmium has the highest density of any stable element and one of the lowest abundances in the Earth's crust. Manufacturers use alloys of osmium with platinum, iridium, and other platinum-group metals for fountain pen nib tipping, electrical contacts, and other applications that require extreme durability and hardness.

== Characteristics == === Physical properties === thumb|left|upright|Osmium, remelted pellet

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

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