Hydrogen and oxygen isotope fractionation during crystallization of mirabilite and ice

Details Hydrogen and oxygen isotope fractionation during crystallization of mirabilite and ice Hydrogen and oxygen isotope fractionation during crystallization of mirabilite and ice

Jan 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974gecoa..38..167s&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 38, Issue 1, pp.167-172

Physics

1

Scientific paper

The equilibrium fractionation factors between mirabilite (Na 2 SO 4 ·10H 2 O) and saturated sodium sulphate solution at 25°C and 0°C and between ice and 2·5 molal sodium chloride solution at -10°C have been measured. For mirabilite, the deuterium factors are 1·017 and 1·019, and the oxygen-18 factors are 1·0014 and 1·0020 at 25°C and 0°C, respectively. For ice, the factors are 1·024 for deuterium and 1·0022 for oxygen-18 at -10°C. These fractionation factors are used to estimate the fractionation factors between ice and mirabilite and concentrated sea water at -10°C. It is concluded that the average binding strengths of hydrogen in ice and mirabilite are very similar.

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