Zirconium - Periodic Table of the Elements

FACULTY OF CHEMICAL TECHNOLOGY IN SPLIT
PERIODIC TABLE OF THE ELEMENTS version 1.7


 Zr

English:  Zirconium
French: Zirconium
Croatian: Cirkonij
German: Zirkonium
Italian: Zirconio


Atomic number: 40
Group numbers: 4
Period: 5
Standard state (20 °C): solid

Zirconium was discovered by Martin Heinrich Klaproth (Germany) in 1789. The origin of the name comes from the Arabic word zargun meaning gold colour. It is grey-white, lustrous, corrosion-resistant metal. Exposed surfaces form oxide protective film.

Electronic configuration: [Kr] 4d² 5s²
Relative atomic mass: 91.224(2)
Formal oxidation number: +4

Electronegativities: 1.33
Thermal conductivity: 22.7 W/(m K)
Electrical resistivity (20 °C): 42.1 μΩcm

Atomic radius: 159 pm
Density (g/dm3): 6506 (293 K) 
5800 (m.p.)
Molar volume (cm3/mol): 14.02 (293 K) 
15.73 (m.p.)

Melting point: 1855 °C
Boiling point: 4409 °C
Critical temperature: 8377 °C

Heat of fusion: 23 kJ/mol
Heat of vaporization: 566.7 kJ/mol
Heat of atomization: 607.47 kJ/mol

Zirconium is found in many minerals such as zircon and baddeleyite. Used in alloys such as zircaloy which is used in nuclear applications since it does not readily absorb neutrons. Also baddeleyite is used in lab crucibles. Used in high-performance pumps and valves. Clear zircon (ZrSiO4) is a popular gemstone. The price of 99.5 % pure zirconium slug is 81.50 € for 100 g. 39Y <= 40Zr => 41Nb ___________________ If you have comments, corrections or suggestions about this site, please send me a e-mail. Periodic Table of the Elements __________________________________ Last modified: 29.03.2003 Copyright © 1998-2003 by Eni Generalic