Zirconium carbide
| Names | |
|---|---|
| Other names
Zirconium(IV) carbide | |
| Identifiers | |
3D model (JSmol) |
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| ECHA InfoCard | 100.031.920 |
| EC Number |
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PubChem CID |
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| RTECS number |
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| UN number | 3178 |
CompTox Dashboard (EPA) |
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| Properties | |
| ZrC | |
| Molar mass | 103.235 g·mol−1 |
| Appearance | Gray refractory solid |
| Odor | Odorless |
| Density | 6.73 g/cm3 (24 °C) |
| Melting point | 3,532–3,540 °C (6,390–6,404 °F; 3,805–3,813 K) |
| Boiling point | 5,100 °C (9,210 °F; 5,370 K) |
| Insoluble | |
| Solubility | Soluble in concentrated H2SO4, HF(aq), HNO3 |
| Structure | |
| Cubic, cF8 | |
| Fm3m, No. 225 | |
a = 4.6976(4) Å α = 90°, β = 90°, γ = 90° | |
| Octahedral | |
| Thermochemistry | |
Heat capacity (C) |
37.442 J/(mol·K) |
Std molar entropy (S⦵298) |
33.14 J/(mol·K) |
Std enthalpy of formation (ΔfH⦵298) |
−207 kJ/mol (extrapolated to stoichiometric composition) −196.65 kJ/mol |
| Hazards | |
| Occupational safety and health (OHS/OSH): | |
Main hazards |
Pyrophoric |
| GHS labelling: | |
| Danger | |
| H228, H302, H312, H332 | |
| P210, P280 | |
| NFPA 704 (fire diamond) | |
| Related compounds | |
Other anions |
Zirconium nitride Zirconium oxide |
Other cations |
Titanium carbide Hafnium carbide Vanadium carbide Niobium carbide Tantalum carbide Chromium carbide Molybdenum carbide Tungsten carbide Silicon carbide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |
Zirconium carbide (ZrC) is an extremely hard refractory ceramic material, commercially used in tool bits for cutting tools. It is usually processed by sintering.