Infobox iron

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Template:Infobox element/2023 taskforce isobox reuse

Iron, 26Fe
Template:Infobox element/symbol-to-top-image/alt
PronunciationTemplate:Infobox element/pronunciation
AllotropesTemplate:Infobox element/symbol-to-allotropes
Appearancelustrous metallic with a grayish tinge
Mass numberTemplate:Infobox element/symbol-to-most-stable-isotope
Iron in the periodic table
Template:Infobox element/periodic table
Atomic number (Z)26
GroupTemplate:Infobox element/symbol-to-group
PeriodTemplate:Infobox element/symbol-to-period
BlockTemplate:Infobox element/block format
Electron configurationTemplate:Infobox element/symbol-to-electron-configuration
Electrons per shell2, 8, 14, 2
Physical properties
Phase at STPTemplate:Infobox element/symbol-to-phase
Melting point1811 K ​(1538 °C, ​2800 °F)
Boiling point3134 K ​(2862 °C, ​5182 °F)
Density (near r.t.)7.874 g/cm3
when liquid (at m.p.)6.98 g/cm3
Heat of fusion13.81 kJ/mol
[[Enthalpy of vaporization|Heat of Template:Engvar]]340 kJ/mol
Molar heat capacity25.10 J/(mol·K)
[[Vapor pressure|Template:Engvar pressure]]
Atomic properties
Oxidation statesTemplate:Infobox element/symbol-to-oxidation-state
ElectronegativityPauling scale: 1.83
[[Ionization energy|Template:Engvar energies]]
  • 1st: 762.5 kJ/mol
  • 2nd: 1561.9 kJ/mol
  • 3rd: 2957 kJ/mol
  • (more)
Atomic radiusempirical: 126 pm
Covalent radiusLow spin: 132±3 pm
High spin: 152±6 pm
Van der Waals radius194 [1] pm
Template:Infobox element/spectral lines
Other properties
Natural occurrenceTemplate:Infobox element/symbol-to-occurrence
Crystal structureTemplate:Infobox element/crystal structure
a=286.65 pm
Crystal structureTemplate:Infobox element/crystal structure
between 1185–1667 K; a=364.680 pm
Speed of sound thin rod5120 m/s (at r.t.) (electrolytic)
Thermal expansion11.8 µm/(m⋅K) (at 25 °C)
Thermal conductivity80.4 W/(m⋅K)
Electrical resistivity96.1 nΩ⋅m (at 20 °C)
Curie point1043 K
Magnetic orderingferromagnetic
Young's modulus211 GPa
Shear modulus82 GPa
Bulk modulus170 GPa
Poisson ratio0.29
Mohs hardness4
Vickers hardness608 MPa
Brinell hardness200–1180 MPa
CAS Number7439-89-6
Discoverybefore 5000 BC
SymbolTemplate:Infobox element/symbol-to-symbol-etymology
Main isotopes of iron
Template:infobox iron isotopes does not exist
| references

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