40
91.22
Zr
Zirconium
Identification
CAS Number: 7440-67-7
Discovery Year: 1789
Discoverer: Martin Klaproth
Discovery Location: Germany
Properties
Atomic Dimensions
Atomic Radius: 155 pm →
Atomic Radius (Rahm): 269 pm
Covalent Radius: 175 pm →Van der Waals Radius: 223 pm
Metallic Radius: 145 pm
Atomic Volume: 14.1 cm³/mol
Lattice Constant: 3.23 Å
Thermodynamics
Electronic Structure
Electron Config: [Kr] 4d2 5s2
Block: d
Period: 5 →Group: 4 →Electronegativity: 1.33 →Electron Affinity: 0.426 eV →Oxidation States: +4
Abundance & Geochemistry
Crust Abundance: 165 mg/kg
Sea Abundance: 0.000029999999999999997 mg/L
Geochemical Class: high field strength
Goldschmidt Class: litophile
About
Grey-white metallic transition element. Five natural isotopes and six radioactive isotopes are known. Used in nuclear reactors for a Neutron absorber. Discovered in 1789 by Martin Klaproth, isolated in 1824 by Berzelius.
Isotopes
Zr-90 90 51.45%
Zr-94 94 17.38%
Zr-92 92 17.15%
Zr-91 91 11.22%
Zr-96 96 2.80%
