Atomic Symbol: Pt
Atomic Number: 78
Atomic Weight: 195.084
Isotopes and Abundances: 190Pt 0.012 %, 192Pt 0.782 %, 194Pt 32.864 %, 195Pt 33.775 %, 196Pt 25.211 %, 198Pt 7.356 %
0.1 MPa Melting Point: 1768.2 °C
0.1 MPa Boiling Point: 3876 °C
Common Valences: +2, +4
Ionic Radii: 4-fold: 60 pm (+2); 6-fold: 80 pm (+2), 62.5 pm (+4)
Pauling Electronegativity: 2.28
First Ionization Energy: 864.39 kJ/mol
Chondritic (CI) Abundance: 866.8 ng/g
Silicate Earth Abundance: 7.6 ng/g
Crustal Abundance: 1.5 ng/g
Seawater Abundance: 0.2–1.5 pmol/kg
Core Abundance: 5700 ng/g
Definition
Atomic number 78 is a dense, refractory, precious metal with a bright silvery-white luster and high resistance to oxidation. First isolated in 1757, it is widely used in jewelry production and catalytic converters in automobiles.
History and Uses
The material referred to as “platina, ” derived from the Spanish for “little silver, ” was first...
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Brenan, J.M. (2016). Platinum. In: White, W. (eds) Encyclopedia of Geochemistry. Encyclopedia of Earth Sciences Series. Springer, Cham. https://doi.org/10.1007/978-3-319-39193-9_228-1
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DOI: https://doi.org/10.1007/978-3-319-39193-9_228-1
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