Encyclopedia of Geochemistry

2018 Edition
| Editors: William M. White

Cobalt

  • Olivier PourretEmail author
  • Michel-Pierre FauconEmail author
Reference work entry
DOI: https://doi.org/10.1007/978-3-319-39312-4_271

Element Data

Atomic Symbol: Co

Atomic Number: 27

Atomic Weight: 58.933195 g/mol

Isotopes and Abundances: 59Co 100%

1 Atm Melting Point: 1495 °C

1 Atm Boiling Point: 2927 °C

Common Valences: 2+, 3+

Ionic Radii: 65 pm (2+, 6-fold coordination)

Pauling Electronegativity: 1.88

First Ionization Energy: 7.88 eV

Chondritic (CI) Abundance: 513 ppma

Silicate Earth Abundance: 102 ppma

Crustal Abundance: 26.6 ppmb

Seawater Abundance: ~3–300 pmol/kgc

Core Abundance: 0.25%d

aPalme et al. (2014)

bRudnick and Gao (2014)

cBruland et al. (2014)

dMcDonough (2014)

Properties

Cobalt (chemical symbol, Co) is a d-block transition metal, bluish white. It appears in the first long period of the periodic table between iron and nickel. Cobalt shares many chemical and physical properties with these two elements. Naturally occurring Co consists of a single stable isotope: 59Co, whereas 60Co is an artificial isotope that is an important γ-ray source. Cobalt has two main oxidation states (2+ and 3+). The common...

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References

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.UniLaSalleBeauvais CedexFrance