ZIRCONIUM

 ZIRCONIUM (40 (Solid)  93(15,000 years)B-  95(84 days)B-

Atomic radius:2.16Deg. A (Quantum mech. value for a free atom)

Atomic volume:14.1 cm(3)/mol at 300Deg. Kelvin

Atomic weight:91.22 (Based on Carbon 12)

Boiling point:4882Deg. Kelvin

Covalent radius:1.45Deg. A

Crystal structure:Hexagonal

Density:6.49 g/cm(3) at 300Deg. Kelvin

Electrical conductivity:.0236 10(x6) Ohm(x.1) K(x.1) at 293Deg. Kelvin

Electron configuration:1s(2)2s(2)p(6)3s(2)p(6)3d(10)4s(2)p(6)4d(2)5s(2)

Electronegativity:1.33 (Pauling's)

First ionization potential:6.84 V

Heat of fusion:16.9 kJ/mol at melting point

Heat of vaporization:58.2 kJ/mol at boiling point

Melting point:2125Deg. Kelvin

Oxidation states:4 Amphoteric

Specific heat capacity:.27 Jg(x.1) K(x.1) at 300Deg. Kelvin

Thermal conductivity:.227 W cm(x.1) K(x.1) at 300Deg. Kelvin

Description:A steel-gray,strong,ductile,chiefly trivalent metallic element

having a high melting point,occurs widely in combination,is highly resistant to

corrosion,and is used especially in alloys,refractories and ceramics.

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