| zirconium minerals | 0.62 |
| mineral | 0.40 |
| resemble zirconium | 0.53 |
| resist corrosion | 0.25 |
| react with oxygen | 0.25 |
| react with nitrogen | 0.25 |
| react with carbon | 0.25 |
| react with boron | 0.25 |
| react with silicon | 0.25 |
| resistant | 0.30 |
| more effective | 0.21 |
| ductile metal | 0.36 |
| penultimate stable isot… | 0.29 |
| discovered | 0.36 |
| difficult to separate | 0.29 |
| used in filament | 0.25 |
| used in electrode | 0.25 |