Main Page | See live article | Alphabetical index Properties General Name Iron (III) oxide Chemical formula Fe2O3 Appearance Red powder Physical Formula weight 159.7 amu Melting point 1838 K (1565 °C) Density 5.2 ×103 kg/m3 Crystal structure Corundum Solubility insoluble Thermochemistry ΔfH0liquid ? kJ/mol ΔfH0solid -824 kJ/mol S0liquid, 1 bar ? J/mol·K S0solid 87 J/mol·K Safety 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. Disclaimer and references Ferric oxide is one of several oxide compoundss of iron, and is most notable for its ferromagnetic properties. It is sometimes known as gamma ferric oxide or synthetic maghemite, and its chemical formula is Fe2O3. Its molecular mass is 159.70 g mol-1, it melts at 1565 degrees Celsius, and has a density of 5.24 g cm-3. 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. See also Iron oxides Iron (III) oxide Rust\n This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.