This title appears in the Scientific Report :
2014
Chemical and structural investigations of BaxRa1-xSO4 on the atomic level by TEM and APT
Chemical and structural investigations of BaxRa1-xSO4 on the atomic level by TEM and APT
Experimental studies related to long-term safety assessments for the deep geologic disposal of spent nuclear fuel suggest that Ra and the formation of the BaxRa1-xSO4 solid solution will be relevant regarding the long-term radiotoxicity. Doerner and Hoskins derived thermodynamic properties for the f...
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Personal Name(s): | Weber, Juliane (Corresponding Author) |
---|---|
Breuer, Uwe / Klinkenberg, Martina / Brandt, Felix / Savenko, Aleksei / Bosbach, Dirk | |
Contributing Institute: |
Nukleare Entsorgung; IEK-6 |
Published in: | 2014 |
Imprint: |
2014
|
Conference: | Atom Probe & Microscopy, Stuttgart (Germany), 2014-08-31 - 2014-09-05 |
Document Type: |
Poster |
Research Program: |
Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC) Safety Research for Nuclear Waste Disposal |
Publikationsportal JuSER |
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100 | 1 | |a Weber, Juliane |0 P:(DE-Juel1)157607 |b 0 |e Corresponding Author |u fzj | |
111 | 2 | |a Atom Probe & Microscopy |g APT & M |c Stuttgart |d 2014-08-31 - 2014-09-05 |w Germany | |
245 | |a Chemical and structural investigations of BaxRa1-xSO4 on the atomic level by TEM and APT | ||
260 | |c 2014 | ||
520 | |a Experimental studies related to long-term safety assessments for the deep geologic disposal of spent nuclear fuel suggest that Ra and the formation of the BaxRa1-xSO4 solid solution will be relevant regarding the long-term radiotoxicity. Doerner and Hoskins derived thermodynamic properties for the formation of a BaxRa1-xSO4 solid solution, e.g. the partition coefficient, from kinetically influenced co-precipitation experiments [1]. Their model is based on assumptions about the uptake and distribution of Ra in the BaxRa1-xSO4 solid. Klinkenberg et al. [2] followed a close-to-equilibrium approach and carried out ToF-SIMS analysis of the solid indicating the uptake of Ra in amounts predicted by thermodynamics. However, for a detailed investigation of the recrystallization process, nano-analytical methods need to be established. Here, we present a method development for the combined characterization of BaSO4 (barite) by atom probe tomography (APT) and transmission electron microscopy (TEM). This method will be applied to the characterization of BaxRa1-xSO4. Preparation is done by focused ion beam (FIB) from particles with a size of 10 40 µm. Since the development of the laser-assisted APT the analysis of electrically non-conductive but thermally conductive materials is possible. Non-conductivity and poor thermal conductivity of barite leaves the APT-analysis of this mineral challenging. [1] H.A. Doerner & W.M. Hoskins, Journal of the American Chemical Society,(1925), 47, 662-675.[2] M. Klinkenberg et al., Environmental Science & Technique, (2014) in review. | ||
700 | 1 | |a Breuer, Uwe |0 P:(DE-Juel1)133840 |b 1 | |
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700 | 1 | |a Savenko, Aleksei |0 P:(DE-Juel1)159473 |b 4 | |
700 | 1 | |a Bosbach, Dirk |0 P:(DE-Juel1)130324 |b 5 | |
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990 | |a Weber, Juliane |0 P:(DE-Juel1)157607 |b 0 |e Corresponding Author |u fzj | ||
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