Sirkonium |
| Simbool | Zr |
|---|---|
| Latynse naam | Zirkonium |
| Atoomgetal | 40 |
| Periode | 5 |
| Element kategorie | Oorgangselemente |
| Relatieve atomiese massa | 91.244 |
| Groep | IV.B |
| Electronegativiteit | 1.4 |
| Oksidering nommers | 4 |
| Elektronkonfigurasie | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d2 5s2 |
| Digtheid [g/cm3] | 6.506 |
| Staat | Vaste stof |
| Smeltpunt [°C] | 1852 |
| Kookpunt [°C] | 3800 |
| Atoomradius [pm] | 206 |
| Covalent radius [pm] | 148 |
| Termiese geleidingsvermoë [W m-1K-1] | 22.7 |
| Hitte kapasiteit [J K-1g-1] | 0.278 |
| Ontdekking | 1789 |
| Hardheid [Mohs-skaal] | 5.0 |
| Vickers se hardheid [MPa] | 903 |
| Brinell-hardheid [MPa] | 650 |
| Young's modulus [GPa] | 68 |
| Elektriese geleiding [S m-1] | 2.3 · 106 |
| Shear modulus [GPa] | 33 |
| 1ste ionisasie-energie [eV] | 6.6339 |
| 2de ionisasie-energie [eV] | 13.13 |
| 3de ionisasie-energie [eV] | 22.99 |
| Stabiele isotope | 5 |
| Onstabiele isotope | 16 |