Show simple item record Soldati, Analía Leticia Jacob, Dorrit E. Glatzel, Pieter Swarbrick, Janine C. Geck, Jochen 2018-09-19T16:38:12Z 2016-03
dc.identifier.citation Soldati, Analía Leticia; Jacob, Dorrit E.; Glatzel, Pieter; Swarbrick, Janine C.; Geck, Jochen; Element substitution by living organisms: The case of manganese in mollusc shell aragonite; Nature Publishing Group; Scientific Reports; 6; 3-2016; 22514-22524
dc.identifier.issn 2045-2322
dc.description.abstract Determining the manganese concentration in shells of freshwater bivalves provides a unique way to obtain information about climate and environmental changes during time-intervals that pre-date instrumental data records. This approach, however, relies on a thorough understanding of how manganese is incorporated into the shell material-a point that remained controversial so far. Here we clarify this issue, using state-of-the-art X-ray absorption and X-ray emission spectroscopy in combination with band structure calculations. We verify that in the shells of all studied species manganese is incorporated as high-spin Mn 2+, i.e. manganese always has the same valence as calcium. More importantly, the unique chemical sensitivity of valence-to-core X-ray emission enables us to show that manganese is always coordinated by a CO 3-octahedron. This, firstly, provides firm experimental evidence for manganese being primarily located in the inorganic carbonate. Secondly, it indicates that the structure of the aragonitic host is locally altered such that manganese attains an octahedral, calcitic coordination. This modification at the atomic level enables the bivalve to accommodate many orders of magnitude more manganese in its aragonitic shell than found in any non-biogenic aragonite. This outstanding feature is most likely facilitated through the non-classical crystallization pathway of bivalve shells.
dc.format application/pdf
dc.language.iso eng
dc.publisher Nature Publishing Group
dc.rights info:eu-repo/semantics/openAccess
dc.subject XANES
dc.subject MICROSCOPY
dc.subject.classification Meteorología y Ciencias Atmosféricas
dc.subject.classification Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification CIENCIAS NATURALES Y EXACTAS
dc.title Element substitution by living organisms: The case of manganese in mollusc shell aragonite
dc.type info:eu-repo/semantics/article
dc.type info:ar-repo/semantics/artículo
dc.type info:eu-repo/semantics/publishedVersion 2018-09-14T14:02:50Z
dc.journal.volume 6
dc.journal.pagination 22514-22524
dc.journal.pais Reino Unido
dc.journal.ciudad Londres
dc.description.fil Fil: Soldati, Analía Leticia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Johannes Gutenberg-Universität; Alemania. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
dc.description.fil Fil: Jacob, Dorrit E.. Macquarie University; Australia
dc.description.fil Fil: Glatzel, Pieter. European Synchrotron Radiation Facility; Francia
dc.description.fil Fil: Swarbrick, Janine C.. European Synchrotron Radiation Facility; Francia
dc.description.fil Fil: Geck, Jochen. Paris Lodron University Salzburg; Austria
dc.journal.title Scientific Reports
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/doi/
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/url/
dc.conicet.fuente individual

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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)