Zr
The symbol for the element zirconium.
| Zr The symbol for zirconium. |
| zirconium (zûr-kō'nē-əm) Symbol Zr A shiny, grayish-white metallic element that occurs primarily in zircon. It is used to build nuclear reactors because of its ability to withstand bombardment by neutrons even at high temperatures. Zirconium is also highly resistant to corrosion, making it a useful component of pumps, valves, and alloys. Atomic number 40; atomic weight 91.22; melting point 1,852°C; boiling point 4,377°C; specific gravity 6.56 (20°C); valence 2, 3, 4. See Periodic Table. |
networking
The old country code for Zaire.
"cd" is now used instead, since Zaire changed its name to the Democratic Republic of the Congo.
(1999-01-27)