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 General | States | Energies | Oxidation & Electrons | Appearance & Characteristics | Reactions | Other Forms Radius | Conductivity | Abundance


Name: Zirconium Symbol: Zr
Group: Trans. Met. Atomic weight: 91.22
Density @ 293 K: 6.4 g/cm3 Atomic volume: 14.1 cm3/mol
Group: Trans. Met. discovered: 1789


state (s, l, g): s
melting point: 2125.2 K boiling point: 4473 K
Heat of fusion: 16.90 kJ/mol Heat of vaporization: 58.20 kJ/mol


1st ionization energy: 660 kJ/mole
electronegativity: 1.33 2nd ionization energy: 1266.8 kJ/mole
electron affinity: 41.1 kJ/mole 3rd ionization energy: 2218.2 kJ/mole
Specific heat: 0.27 J/gK heat atomization: 609 kJ/mole atoms

Oxidation & Electrons:

Shells: 2,8,18,10,2 electron configuration: [Kr] 4d2 5s2
minimum oxidation number: 0 maximum oxidation number: 4
min. common oxidation no.: 0 max. common oxidation no.: 4

Appearance & Characteristics:

structure: hcp: hexagonal close pkd color: grayish-white
uses: deodorants, fuel rod clad toxicity:
hardness: mohs characteristics: hard, relatively inert


reaction with air: mild, w/ht =>Zr2O3
reaction with 6M HCl: none reaction with 6M HCl: none
reaction with 15M HNO3: passivated reaction with 6M NaOH: none

Other Forms:

number of isotopes: 5 hydride(s): ZrH2
oxide(s): ZrO2 chloride(s): ZrCl3 ZrCl4


ionic radius (2- ion): pm ionic radius (1- ion): pm
atomic radius: 160 pm ionic radius (1+ ion): pm
ionic radius (2+ ion): pm ionic radius (3+ ion): pm


thermal conductivity: 22.7 J/m-sec-deg
electrical conductivity: 25 1/mohm-cm polarizability: 17.9 A^3


source: Zircon (silicate)
rel. abund. solar system: 1.057 log abundance earth's crust: 2.24 log
cost, pure: 16 $/100g cost, bulk: 16 $/100g