Iridium(IV) oxide
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| Names | |
|---|---|
| Other names
Iridium dioxide | |
| Identifiers | |
12030-49-8  | |
| ChemSpider | 10605808 |
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| Jmol-3D images | Image |
| PubChem | 82821 |
| |
| Properties | |
| IrO2 | |
| Molar mass | 224.22 g/mol |
| Appearance | black solid |
| Density | 11.66 g/cm3 |
| Melting point | 1,100 °C (2,010 °F; 1,370 K) decomposes |
| insoluble | |
| Structure | |
| Crystal structure | Rutile (tetragonal) |
| Octahedral (Ir); Trigonal (O) | |
| Hazards | |
| EU Index | Not listed |
| Flash point | Non-flammable |
| Related compounds | |
| Other anions |
iridium(IV) fluoride, iridium disulfide |
| Other cations |
rhodium dioxide, osmium dioxide, platinum dioxide |
| Related compounds |
iridium(III) oxide |
| Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa) | |
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| Infobox references | |
Iridium(IV) oxide, IrO2, is the only well characterised oxide of iridium. Its crystal has the TiO2, rutile structure containing six coordinate iridium and three coordinate oxygen.[1]
It is used with other rare oxides in the coating of anode-electrodes for industrial electrolysis and in microelectrodes for electrophysiology research.[2]
It can be formed by oxidation of iridium black, a finely divided powder of iridium metal.
References
- ↑ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 0080379419.
- ↑ Cogan, Stuart F. (August 2008). "Neural Stimulation and Recording Electrodes". Annual Review of Biomedical Engineering 10 (1): 275–309. doi:10.1146/annurev.bioeng.10.061807.160518.
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