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  4. Materials (hierarchy name)
  5. materials (substances)
  6. [materials by composition]
  7. inorganic material
  8. metal
  9. [metal by composition or origin]
  10. nonferrous metal
  11. zirconium
Scope note
Zirconium is a metallic element having symbol Zr and atomic weight 91.22. It is obtained from zircon and other minerals and is commercially the most important ore. A hard metal resistant to heat and corrosion, it is much used in nuclear reactors, in alloys, refractories, and ceramics.
Accepted term: 15-Jul-2024