Iron(II) Oxide

FeO

IUPAC: Iron(II) oxide

CAS: 1345-25-1

Overview

Iron(II) oxide (wustite) is a non-stoichiometric black mineral. It is thermodynamically unstable and tends to disproportionate to iron and Fe₃O₄.

Composition

Element Symbol Atoms Atomic Mass
Oxygen O 1 15.9990
Iron Fe 1 55.8450

Elemental Composition

O
Oxygen ×1
22.3%
Fe
Iron ×1
77.7%

Uses

  • • Steel manufacturing
  • • Pigment
  • • Ceramic glaze

Fun Facts

  • ✦ Thermodynamically unstable below 570°C, spontaneously converting to iron and magnetite

Structure

SMILES

[O-2].[Fe+2]

Properties

Type
oxide
State
solid
Molar Mass
71.84 g/mol
Density
5.7450 g/cm³
Melting Point
1377.0 °C
Solubility
insoluble

Molecular Descriptors

Exact Mass
71.9299
TPSA
1.0 Ų
H-Bond Donors
0
H-Bond Acceptors
1
Rotatable Bonds
0
Heavy Atoms
2
Complexity
0.0

Related Compounds

Aluminum Oxide

Al₂O₃

Antimony Trioxide

Sb₂O₃

Barium Oxide

BaO

Beryllium Oxide

BeO

Bismuth(III) Oxide

Bi₂O₃

Boron Trioxide

B₂O₃

Cadmium Oxide

CdO

Calcium Oxide

CaO

Carbon Dioxide

CO₂

Carbon Monoxide

CO

Frequently Asked Questions

What is Iron(II) Oxide?
Iron(II) Oxide (FeO) is a oxide compound with the IUPAC name Iron(II) oxide.
What is the molecular weight of Iron(II) Oxide?
Iron(II) Oxide has a molar mass of 71.84 g/mol.
What state is Iron(II) Oxide at room temperature?
Iron(II) Oxide is a solid at room temperature.
Is Iron(II) Oxide organic or inorganic?
Iron(II) Oxide is classified as an inorganic compound.
What elements make up Iron(II) Oxide?
Iron(II) Oxide (FeO) is composed of Oxygen (O), Iron (Fe).