Layer-structured uranyl-oxide hydroxy-hydrates with Pr(III) and Tb(III) ions: hydroxyl to oxo transition driven by interlayer cations

Kód výsledku v IS VaVaI

RIV/00023272:_____/20:10134937 - isvavai.cz

Výsledek na webu

https://pubs.rsc.org/en/content/articlelanding/2020/dt/d0dt00526f/unauth#!divAbstract

DOI - Digital Object Identifier

10.1039/d0dt00526f

Jazyk výsledku

angličtina

Název v původním jazyce

Layer-structured uranyl-oxide hydroxy-hydrates with Pr(III) and Tb(III) ions: hydroxyl to oxo transition driven by interlayer cations

Popis výsledku v původním jazyce

We report the hydrothermal synthesis and characterization of two uranyl-oxide hydroxy-hydrate compounds with Pr(III) (U-Pr) and Tb(III) (U-Tb) ions prepared via direct hydrothermal reactions of lanthanide (Ln = Pr or Tb) ions with a uranyl-oxide hydroxy-hydrate phase, schoepite. Both compounds U-Pr and U-Tb show thin plate morphologies with atomic ratios of 2 (U : Pr) and 6 (U : Tb) and have been characterized by multiple techniques. The layered structures with interlayer hydrated Pr(iii) or Tb(s) ions formed via uranyl-Pr/Tb interactions have been confirmed by synchrotron single crystal X-ray diffraction studies. In addition, the evolution of the uranyl oxide hydroxide layers and anion topologies upon increasing the concentration of interlayer cations by using different U : Ln (Ln = Pr or Tb) ratios has been discussed. The success in the preparation and characterization of compounds U-Pr and U-Tb with different U : Ln (Ln = Pr or Tb) ratios highlights the flexibility of the uranyl oxide hydroxide layers with respect to the incorporation of interlayer cations via a gradual hydroxyl to oxo transition. The study has direct implications in regard to the natural weathering of uraninite mineral and the alteration of spent nuclear fuels during the long-term geological disposal.

Název v anglickém jazyce

Layer-structured uranyl-oxide hydroxy-hydrates with Pr(III) and Tb(III) ions: hydroxyl to oxo transition driven by interlayer cations

Popis výsledku anglicky

We report the hydrothermal synthesis and characterization of two uranyl-oxide hydroxy-hydrate compounds with Pr(III) (U-Pr) and Tb(III) (U-Tb) ions prepared via direct hydrothermal reactions of lanthanide (Ln = Pr or Tb) ions with a uranyl-oxide hydroxy-hydrate phase, schoepite. Both compounds U-Pr and U-Tb show thin plate morphologies with atomic ratios of 2 (U : Pr) and 6 (U : Tb) and have been characterized by multiple techniques. The layered structures with interlayer hydrated Pr(iii) or Tb(s) ions formed via uranyl-Pr/Tb interactions have been confirmed by synchrotron single crystal X-ray diffraction studies. In addition, the evolution of the uranyl oxide hydroxide layers and anion topologies upon increasing the concentration of interlayer cations by using different U : Ln (Ln = Pr or Tb) ratios has been discussed. The success in the preparation and characterization of compounds U-Pr and U-Tb with different U : Ln (Ln = Pr or Tb) ratios highlights the flexibility of the uranyl oxide hydroxide layers with respect to the incorporation of interlayer cations via a gradual hydroxyl to oxo transition. The study has direct implications in regard to the natural weathering of uraninite mineral and the alteration of spent nuclear fuels during the long-term geological disposal.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10504 - Mineralogy

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Dalton Transactions

ISSN

1477-9226

e-ISSN

—

Svazek periodika

49

Číslo periodika v rámci svazku

18

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

5832-5841

Kód UT WoS článku

000534340700009

EID výsledku v databázi Scopus

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