TY  - JOUR
AU  - Tolnai, I.
AU  - Osan, J.
AU  - Jovari, P.
AU  - Pinakidou, F.
AU  - Sulyok, A.
AU  - Fabian, Margit
TI  - Structural characterization of uranium and lanthanide loaded borosilicate glass matrix
JO  - Scientific reports
VL  - 15
IS  - 1
SN  - 2045-2322
CY  - [London]
PB  - Springer Nature
M1  - PUBDB-2025-04151
SP  - 28352
PY  - 2025
AB  - Borosilicate glass is a potential candidate for high-level radioactive waste conditioning, thusunderstanding the effects caused by the combined presence of uranium and actinides within thesematrices is of great importance. The glass matrix was simultaneously loaded with UO<sub>2</sub> and lanthanideoxides (CeO<sub>2</sub>, Nd<sub>2</sub>O<sub>2</sub>, and Eu<sub>2</sub>O<sub>2</sub>) as chemical surrogates for actinides. Neutron diffraction incombination with Reverse Monte Carlo simulation confirmed that the basic glass structure is comprised of tetrahedral SiO<sub>4</sub>, and BO<sub>2</sub>/BO<sub>2</sub> units. X-ray absorption spectroscopy indicated the presence of Ce mainly as CeIII and the co-existence of U<sup>V</sup> and U<sup>VI</sup>. U acts as an intermediate oxide and reduces the number of four-coordinated B, lanthanide ions serve as modifiers, with their increasing concentration shifting the B-O coordination from 3 to 4. X-ray photoelectron spectroscopy revealed a depthdependent variation in the U<sup>IV</sup>/U<sup>VI</sup> ratio. Leaching tests showed increased dissolution of Si, B, and Na, compared to the glass matrix. 
LB  - PUB:(DE-HGF)16
DO  - DOI:10.1038/s41598-025-13166-1
UR  - https://bib-pubdb1.desy.de/record/638686
ER  -