Zirconium

Zirconium is found in the Earth's crust, 0.023 % (w/w), in the minerals zircon, malacon, baddeleyite, ziekelite, eudialyte and rare earth minerals in mozanite sand [5]. The isotopes found in nature are ⁹⁰Zr (51.46 %, stable), ⁹¹Zr (11.23 %, stable), ⁹²Zr (17.11 %, stable), ⁹⁴Zr (17.40 %, stable) and ⁹⁶Zr (2.80 %, stable) [5].

In pure form, zirconium occurs in the following crystal forms:
α-form: Hexagonal crystal at < 865 °C [5]
β-form: Body-centered cubic at > 865 °C [5]