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DictionaryhafniumMetallic element
noun

hafnium

HAF-nee-um/ˈhæfniəm/

A metallic chemical element used in heat-resistant alloys and nuclear control rods.

Hafnium helps control nuclear reactions by absorbing neutrons inside reactors.

In a high-temperature testing lab, a metallic sample sits inside a heat-resistant apparatus beside nuclear equipment, showing the element's specialized industrial use.
Etymology
hafnLatinCopenhagen
+iumLatinmetallic element ending

Hafnia names Copenhagen, where the element was discovered. Combined with the metallic-element ending -ium, it makes the element’s name a tribute to its place of discovery.

In context

PBS Eons narrator8:45
But this time, they're isotopes of the element hafnium.
When a Billion Years Disappeared
The Infographics Show narrator8:12
The alloy that was created was a combination of three elements: hafnium, tantalum, and carbon.
What Happens If You Fire a Gun in Space?

More examples

  • Engineers add hafnium to alloys that must withstand extreme heat.
  • The reactor uses control rods containing hafnium.
  • Hafnium is a silvery metal with a high melting point.

Forms

hafnium