←Y   Ge↑   ↓Sn   Nb→

Zirkonium ∙ zirconium ∙ zirconio ∙ circonio
group IV: RH₄, RO₂

• melting point: 1852°C ±2°C
• boiling point: 4377°C
• density: 6.4 g/cm³

⚒ minerals:
zircone ZrSiO₄
Yttria-stabilized-Zirconia ceramic

Zircone may contain up to 150 Bq/g U or 400 Bq/g Th.

☢ radioisotopes:
Zr-95 (T1/2=64 d) fission product