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osmium
Image: Wikimedia Commons

osmium

Chemical element with symbol Os and atomic number 76

Chemical elementchemical elementQ751

Also known as element 76 · Os · 76Os

Symbol
Atomic number
  • 76
Mass
Melting point
  • 3,400 K
Boiling point
  • 5,273 K
Density
  • 22,359.7 kg/m³
Discovered by
Discovered

Overview

All data

131 statements · 27% with external sources · numbers in brackets are citations

Subclass of
Named after
Canonical SMILES
Formula
Unicode character
Electronegativity
  • 2.2
Part of
Ionic radius
  • 0.63 ångström charge number: 4 · coordination number: 6
  • 0.58 ångström charge number: 5 · coordination number: 6
  • 0.55 ångström charge number: 6 · coordination number: 6
  • 0.39 ångström charge number: 8 · coordination number: 4
Oxidation state
Electron configuration
  • [Xe] 4f¹⁴ 5d⁶ 6s²
Space group
Crystal system
Bulk modulus
  • 400B Pa
Shear modulus
  • 245B Pa
Poisson's ratio
  • 0.246
Thermal conductivity
  • 88 watt per metre kelvin
Electrical conductivity
  • 10.9M siemens per metre
Specific heat capacity
  • 130 joule per kilogram kelvin
Speed of sound
  • 4,940 m/s
Point group
Mohs' hardness
  • 7
Has characteristic
Ionization energy
IPA transcription
Atomic radius
  • 130 picometre
Covalent radius
  • 144 picometre

On other databases

64 identifiers linking osmium across the web's reference databases