Barium isotope fractionation during experimental formation of the double carbonate BaMn[CO₃]₂ at ambient temperature

Böttcher, Michael E.; Geprägs, Patrizia; Neubert, Nadja; Allmen, Katja von; Pretet, Chloé; Samankassou, Elias; Nägler, Thomas F.

doi:10.1080/10256016.2012.673489

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Journal article

Barium isotope fractionation during experimental formation of the double carbonate BaMn[CO₃]₂ at ambient temperature

Böttcher, Michael E. Geochemistry & Stable Isotope Geochemistry Group, Marine Geology Section, Leibniz Institute for Baltic Sea Research (IOW), Warnemünde, Germany
Geprägs, Patrizia Geochemistry & Stable Isotope Geochemistry Group, Marine Geology Section, Leibniz Institute for Baltic Sea Research (IOW), Warnemünde, Germany - Geoscience Department, University of Bremen, Germany
Neubert, Nadja Geochemistry & Stable Isotope Geochemistry Group, Marine Geology Section, Leibniz Institute for Baltic Sea Research (IOW), Warnemünde, Germany - Institute of Geological Sciences, University of Bern, Switzerland - Institute for Mineralogy, University of Hannover, Germany
Allmen, Katja von Department of Geosciences, University of Fribourg, Switzerland - Section of Earth and Environmental Sciences, University of Geneva, Switzerland - B+G, Betontechnologie und Materialbewirtschaftung AG, Gümligen, Switzerland
Pretet, Chloé Section of Earth and Environmental Sciences, University of Geneva, Switzerland
Samankassou, Elias Section of Earth and Environmental Sciences, University of Geneva, Switzerland
Nägler, Thomas F. Institute of Geological Sciences, University of Bern, Switzerland

30.03.2012

Published in:

Isotopes in Environmental and Health Studies. - 2012, vol. 48, no. 3, p. 457-463

barium manganese II double carbonate

English In this study, we present the first experimental results for stable barium (Ba) isotope (¹³⁷Ba/¹³⁴Ba) fractionation during low-temperature formation of the anhydrous double carbonate BaMn[CO₃]₂. This investigation is part of an ongoing work on Ba fractionation in the natural barium cycle. Precipitation at a temperature of 21±1°C leads to an enrichment of the lighter Ba isotope described by an enrichment factor of−0.11±0.06‰ in the double carbonate than in an aqueous barium-manganese(II) chloride/sodium bicarbonate solution, which is within the range of previous reports for synthetic pure BaCO ₃ (witherite) formation.

Faculty

Faculté des sciences et de médecine

Department

Département de Géosciences

Language