Zirconium dioxide
| Names | |
|---|---|
| IUPAC names
Zirconium dioxide Zirconium(IV) oxide | |
| Other names
Zirconia Baddeleyite | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.013.844 |
| EC Number |
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PubChem CID |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| ZrO 2 | |
| Molar mass | 123.218 g/mol |
| Appearance | white powder |
| Density | 5.68 g/cm3 |
| Melting point | 2,715 °C (4,919 °F; 2,988 K) |
| Boiling point | 4,300 °C (7,770 °F; 4,570 K) |
| negligible | |
| Solubility | soluble in HF, and hot H2SO4 |
Refractive index (nD) |
2.13 |
| Thermochemistry | |
Std molar entropy (S⦵298) |
50.3 J K−1 mol−1 |
Std enthalpy of formation (ΔfH⦵298) |
−1080 kJ/mol |
| Hazards | |
| GHS labelling: | |
| Warning | |
| H315, H319, H335 | |
| P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501 | |
| Flash point | Non-flammable |
| Lethal dose or concentration (LD, LC): | |
LD50 (median dose) |
> 8.8 g/kg (oral, rat) |
| Safety data sheet (SDS) | MSDS |
| Related compounds | |
Other anions |
Zirconium disulfide |
Other cations |
Titanium dioxide Hafnium dioxide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |
Zirconium dioxide (ZrO
2), sometimes known as zirconia (not to be confused with zirconium silicate or zircon), is a white crystalline oxide of zirconium. Its most naturally occurring form, with a monoclinic crystalline structure, is the mineral baddeleyite. A dopant stabilized cubic structured zirconia, cubic zirconia, is synthesized in various colours for use as a gemstone and a diamond simulant.