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Title

Barium isotope fractionation during experimental formation of the double carbonate BaMn[CO 3 ] 2 at ambient temperature

Authors
Böttcher, Michael E.
Geprägs, Patrizia
Neubert, Nadja
Nägler, Thomas F.
Published in Isotopes in Environmental and Health Studies. 2012, p. 1-7
Abstract 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.
Keywords ambient temperaturebarium-134barium-137barium-manganese(II) double carbonateisotope effectsprecipitation experiment
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Research group Sedimentology, Biostratigraphy and Micropaleontology
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BÖTTCHER, Michael E. et al. Barium isotope fractionation during experimental formation of the double carbonate BaMn[CO 3 ] 2 at ambient temperature. In: Isotopes in Environmental and Health Studies, 2012, p. 1-7. https://archive-ouverte.unige.ch/unige:19409

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Deposited on : 2012-04-17

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