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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
Von Allmen, Katja
Pretet, Chloe
Samankassou, Elias
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 temperature — barium-134 — barium-137 — barium-manganese(II) double carbonate — isotope effects — precipitation experiment
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Structures
Faculté des sciences / Section des sciences de la Terre et de l'Environnement / Département des sciences de la Terre
Research group Sedimentology, Biostratigraphy and Micropaleontology
Citation
(ISO format) 		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. doi: 10.1080/10256016.2012.673489 https://archive-ouverte.unige.ch/unige:19409

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Deposited on : 2012-04-17

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