General
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Name | Iron (III) oxide |
Chemical formula | Fe2O3 |
Appearance | Red powder |
Physical
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Formula weight | 159.7 amu |
Melting point | 1838 K (1565 °C) |
Density | 5.2 ×103 kg/m3 |
Crystal structure | Corundum |
Solubility | insoluble |
Thermochemistry
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ΔfH0liquid | ? kJ/mol |
ΔfH0solid | -824 kJ/mol |
S0liquid, 1 bar | ? J/mol·K |
S0solid | 87 J/mol·K |
Safety
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Ingestion | Dangerous, iron poisoning may result. |
Inhalation | Iron poisoning, pulmonary edema may result. |
Skin | Contact with molten iron ore can cause iron poisoning. |
Eyes | May cause irritation. |
More info | Hazardous Chemical Database |
SI units were used where possible. Unless otherwise stated, standard conditions were used. |
It is often used in magnetic storage, for example in the magnetic layer of floppy disks. These consist of a thin sheet of mylar plastic, coated with ferric oxide. The particles can be magnetised to represent binary data. Magnetic Ink Character Recognition also uses ferric oxide compounds, suspended in an ink which can be read by special scanning hardware.