This title appears in the Scientific Report :
2016
Please use the identifier:
http://dx.doi.org/10.1021/acs.cgd.6b00978 in citations.
Influence of Synthetic Conditions on Chemistry and Structural Properties of Alkaline Earth Uranyl Borates
Influence of Synthetic Conditions on Chemistry and Structural Properties of Alkaline Earth Uranyl Borates
Four novel alkaline earth metal uranyl borates, namely, A[(UO2)5(BO3)2O2(OH)2]∙5H2O (SrUBO-1, BaUBO-1) and A[(UO2)2(B2O5)O] (SrUBO-2, BaUBO-2) (A = Sr, Ba), have been prepared. SrUBO-1, BaUBO-1, and BaUBO-2 were synthesized using hydrothermal methods, whereas SrUBO-2 was prepared by a traditional hi...
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Personal Name(s): | Hao, Yucheng |
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Klepov, Vladislav V. / Murphy, Gabriel L / Modolo, Giuseppe / Bosbach, Dirk / Albrecht-Schmitt, Thomas E. / Kennedy, Brendan J / Wang, Shuao / Alekseev, Evgeny (Corresponding author) | |
Contributing Institute: |
Nukleare Entsorgung; IEK-6 |
Published in: | Crystal growth & design, 16 (2016) 10, S. 5923–5931 |
Imprint: |
Washington, DC
ACS Publ.
2016
|
DOI: |
10.1021/acs.cgd.6b00978 |
Document Type: |
Journal Article |
Research Program: |
Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC) Helmholtz Young Investigators Group: Energy Nuclear Waste Management |
Publikationsportal JuSER |
Four novel alkaline earth metal uranyl borates, namely, A[(UO2)5(BO3)2O2(OH)2]∙5H2O (SrUBO-1, BaUBO-1) and A[(UO2)2(B2O5)O] (SrUBO-2, BaUBO-2) (A = Sr, Ba), have been prepared. SrUBO-1, BaUBO-1, and BaUBO-2 were synthesized using hydrothermal methods, whereas SrUBO-2 was prepared by a traditional high-temperature solid-state method. The compounds SrUBO-1 and BaUBO-1 were found to be iso-structural and crystallized in the centrosymmetric group C2/c. Their structure features two-dimensional anionic layers {[(UO2)5(BO3)2O2(OH)2]2-}n that are composed of [(UO2)5O2(OH)2]4+ clusters and [BO3]3- polyanions. From a topological point, this two-dimensional anionic layer can be described as a new 4-nodal net topological type with a Schläfli symbol of {35.45}2{36.46.53}3{37.47.57}2. SrUBO-2 and BaUBO-2 are iso-structural and crystallized in space group C2/m. Their structures are based on a three-dimensional {[(UO2)2(B2O5)O]2-}n. Within the three-dimensional framework, two-dimensional U(2)-U(1)=U(3) layers (L1) with cation to cation interactions between [U(3)O2]2+ groups and one-dimensional edge sharing U(1)-U(2) chains are present. The B2O5 dimers corner sharing with U(1)-U2 chains and U(3)O6 tetragonal bipyramids forming two-dimensional layers (L2). L1 further vertically interconnect with L2 through bridging B2O5 dimers, forming a three-dimensional framework [(UO2)2(B2O5)O]2-. The synthetic conditions, structural characterization, thermal stability as well as spectroscopic properties of the alkaline earth metal uranyl borates are reported and discussed. |