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Neutronenaktivierungsanalytische Bestimmung einiger Spurenelemente in meteoritischen Phasen

Neutron activation analytical determination of a number of trace elements in meteoritic phases

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Zusammenfassung

Die Verteilung von Spurenelementen über die vier Hauptphasen von Eisenmeteoriten (Metall-, Phosphid-, Graphit- und Sulfidphase) wurde mittels Neutronenaktivierung untersucht. Aus den Verteilungsverhältnissen ergibt sich ein stark chalkophiles Verhalten für Se und Cr, hingegen stark siderophiles Verhalten für die Elemente Sb und As. Überraschenderweise ist der Hauptteil des Mo im Schreibersit vertreten. Mit Ausnahme der Elemente Cr und Mo sind im übrigen alle von uns untersuchten Elemente in jenen Phasen vertreten, die auch in Chondriten auftreten. Aus den von uns erstmals durchgeführten umfassenden Analysen ergeben sich somit gewisse Konsequenzen für die Affinitätsänderungen dieser Elemente während der Entstehung und Genesis des meteoritischen Materials.

Summary

The distribution of trace elements over four main phases of iron meteorites (metallic-, phosphidic-, graphitic- sulfidic phases) was investigated by means of neutron activation.

A strong chalcophilic behavior for selenium and chromium was deduced from the distribution circumstances, as opposed to strong siderophilic behavior for the elements antimony and arsenic. Most surprisingly, the main part of the molybdenum is present in the form of schreibersite. With the exception of the elements chromium and molybdenum, all of the other elements studied by the writers are represented in those phases that also occur in chondrites Hence certain consequences with regard to the affinity changes of these elements during the creation and genesis of the meteoritic material are disclosed by the comprehensive analyses conducted for the first time by the authors.

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Herrn Prof. Dr.H. Nowotny zum 60. Geburtstag gewidmet.

The research reported in this document has been sponsored by theUnited States Government under Contract F 61052-68-C-0040.

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Hermann, F., Kiesl, W., Kluger, F. et al. Neutronenaktivierungsanalytische Bestimmung einiger Spurenelemente in meteoritischen Phasen. Mikrochim Acta 59, 225–240 (1971). https://doi.org/10.1007/BF01219619

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  • DOI: https://doi.org/10.1007/BF01219619

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