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The FeSe$$_{2}$$(cr) solubility determined by solubility experiments of Se co-existing with Fe

Doi, Reisuke  ; Uchikoshi, Keiji*; Beppu, Hikari*

To determine log K$$^{0}$$ for FeSe$$_{2}$$(cr) dissolution reaction, solubility experiments of Se co-existing with Fe were performed. Temperature was maintained at 348 K. Se concentration as a function of equilibration periods indicated that Se concentrations were similar at different equilibration periods. Only FeSe$$_{2}$$(cr) was detected as the Se solid phase by XRD analysis of the equilibrated precipitates. $$E_{rm h}$$ and pH of the equilibrated suspensions ranged from -188.6 to -4.9 mV vs. SHE and 6.00 to 8.76, respectively. Se$$_{4}$$$$^{2-}$$ and Fe$$^{2+}$$ are thermodynamically stable in this region. Interpretations using SIT model showed that the relationship between $$E_{rm h}$$ and the measured concentrations could be interpreted well when in the following equation n = 0.50$$pm$$0.01 and log K $$^{0}$$ = -17.24$$pm$$0.31 : 4Fe$$_{n}$$Se(cr) = 4nFe$$^{2+}$$ + Se$$_{4}$$$$^{2-}$$ + (8n - 2)e$$^{-}$$. The logK$$^{0}$$ value calculated from the available thermodynamic data agrees with that determined here.

Language

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English

Journal

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Journal of Nuclear Science and Technology

Volume

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53

Number

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10

Pages

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p.1554 - 1562

Publication Year/Month

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2016/10

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Held date

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Location (country)

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Patent information

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PDF

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Paper URL

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https://doi.org/10.1080/00223131.2015.1137245

DOI for research data

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Keywords

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no keyword

Research Facility

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QUALITY(地層処分放射化学研究施設)  

Press Release

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Article of JAEA R&D Review

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Cooperating Institute

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Accesses

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- Accesses

InCites™

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Percentile:28.28

Category:Nuclear Science & Technology

Altmetrics

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