铱 (yī) - Iridium — a chemical element with symbol Ir & a very hard, brittle, silvery-white transition metal of

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Iridium — a chemical element with symbol Ir and atomic number 77;

a very hard, brittle, silvery-white transition metal of the platinum group.

Iridium — a chemical element with symbol Ira very hard, brittle, silvery-white transition metal of

Usage highlights

Iridium metalIridium elementIridium compoundIridium catalystIridium alloyIridium spark plug

Synonyms

Usage & contexts

Examples

  • Iridium is used in high-temperature applications (铱金属).
  • The element has exceptional corrosion resistance (铱元素).
  • Some spark plugs contain iridium (铱金火花塞).
  • Iridium compounds are used in industrial catalysts (铱化合物).

Collocations

  • Iridium metal(铱金属)
  • Iridium element(铱元素)
  • Iridium compound(铱化合物)
  • Iridium catalyst(铱催化剂)
  • Iridium alloy(铱合金)
  • Iridium spark plug(铱金火花塞)

Cultural background

FAQ
  • Discovered in 1803 by Smithson Tennant and named after Iris, the Greek goddess of the rainbow, due to the colorful nature of its salts.
  • Iridium is one of the rarest elements in Earth's crust, with annual production and consumption of only about three tonnes.
  • The Cretaceous–Paleogene boundary is marked by a thin layer of clay enriched with iridium, evidence for the asteroid impact theory of dinosaur extinction.

FAQ