Encyclopedia of Geochemistry

2018 Edition
| Editors: William M. White

Calcium

  • Christophe LécuyerEmail author
Reference work entry
DOI: https://doi.org/10.1007/978-3-319-39312-4_254

Element Data

Atomic Symbol: Ca

Atomic Number: 20

Atomic Weight: 40.078(4)

Isotopes and Abundances: 40Ca, 96.941(156)%; 42Ca, 0.647(23)%; 43Ca, 0.135(10)%; 44Ca, 2.086(110)%; 48Ca, 0.187(21)%

1 Atm Melting Point: 840 °C

1 Atm Boiling Point: 1,484 °C

Common Valences: +2

Ionic Radii: 6-fold: 114 pm

Pauling Electronegativity: 1.00

First Ionization Potential: 589.83 kJ.mol−1

Chondritic (CI) Abundance: 9,110 ppm (59,820 atoms/106 Si)

Silicate Earth Abundance: 25,300 ppm

Crustal Abundance: 41,500 ppm

Seawater Abundance: 412 to 420 ppm

Core Abundance: ~0

Properties

Calcium is a metal (alkaline earth) with a silvery color and a cubic crystal structure. This element belongs to group 2 and period 4 of the periodic table (Fig. 1). Calcium has 25 known isotopes of which 5 are stable (source of data: National Institute of Standards and Technology: http://www.nist.gov/pml/data/comp.cfm).
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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Laboratoire de Géologie de Lyon, LGL-TPECNRS UMR 5276, Université Claude Bernard Lyon 1 and Institut Universitaire de FranceLyonFrance