Names | |
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Other names
Zirconium(IV) carbide
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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)[1] |
Melting point | 3,532–3,540 °C (6,390–6,404 °F; 3,805–3,813 K)[1][2] |
Boiling point | 5,100 °C (9,210 °F; 5,370 K)[2] |
Insoluble | |
Solubility | Soluble in concentrated H2SO4, HF,[1] HNO3 |
Structure | |
Cubic, cF8[3] | |
Fm3m, No. 225[3] | |
a = 4.6976(4) Å[3] α = 90°, β = 90°, γ = 90°
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Octahedral[3] | |
Thermochemistry | |
Heat capacity (C)
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37.442 J/mol·K[4] |
Std molar
entropy (S⦵298) |
33.14 J/mol·K[4] |
Std enthalpy of
formation (ΔfH⦵298) |
−207 kJ/mol (extrapolated to stoichiometric composition)[5] −196.65 kJ/mol[4] |
Hazards | |
Occupational safety and health (OHS/OSH): | |
Main hazards
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Pyrophoric |
GHS labelling: | |
[6] | |
Danger | |
H228, H302, H312, H332[6] | |
P210, P280[6] | |
NFPA 704 (fire diamond) | |
Related compounds | |
Other anions
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Zirconium nitride Zirconium oxide |
Other cations
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Titanium carbide Hafnium carbide Vanadium carbide Niobium carbide Tantalum carbide Chromium carbide Molybdenum carbide Tungsten carbide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Zirconium carbide (ZrC) is an extremely hard refractory ceramic material,[7] commercially used in tool bits for cutting tools. It is usually processed by sintering.