Research output: Contribution to journal › Article › peer-review
Uranyl silicate nanotubules in Rb2[(UO2)2O(Si3O8)]: synthesis and crystal structure. / Назарчук, Евгений Васильевич; Сийдра, Олег Иоханнесович; Чаркин, Д. О.; Тагирова, Яна Галиевна.
In: Zeitschrift fur Kristallographie - Crystalline Materials, 29.08.2023.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Uranyl silicate nanotubules in Rb2[(UO2)2O(Si3O8)]: synthesis and crystal structure
AU - Назарчук, Евгений Васильевич
AU - Сийдра, Олег Иоханнесович
AU - Чаркин, Д. О.
AU - Тагирова, Яна Галиевна
PY - 2023/8/29
Y1 - 2023/8/29
N2 - A new rubidium uranyl silicate, Rb2(UO2)2O(Si3O8) (1), was obtained using high-temperature approach from the melt in silica tubes. Its crystal structure was solved by direct methods: hexagonal, P6/m, a = 27.7992(7), c = 7.2346(2) » Å, V = 4841.8(3) » Å3, R1 = 0.033. The structure of 1 represents a new structure type with unprecedented topology not observed before among U(VI) oxides and oxysalts. It is comprised of layers with large voids derived from the U3O8 structure formed exclusively by pentagonal UrO5 bipyramids. The low-occupied Rb sites are located in the interlayer space. The SiO4 silicate tetrahedra in the structure of 1 share vertices to form rolled [Si6O16]8- chains. The nanotubules [(UO2)(Si6O16)]6- penetrate through both U3O8-derived layers and Rb interlayer. These tubules are attached to the U3O8 derived sheets via uranyl-uranyl interactions and edge-sharing between silicate tetrahedra and UrO5 bipyramids.
AB - A new rubidium uranyl silicate, Rb2(UO2)2O(Si3O8) (1), was obtained using high-temperature approach from the melt in silica tubes. Its crystal structure was solved by direct methods: hexagonal, P6/m, a = 27.7992(7), c = 7.2346(2) » Å, V = 4841.8(3) » Å3, R1 = 0.033. The structure of 1 represents a new structure type with unprecedented topology not observed before among U(VI) oxides and oxysalts. It is comprised of layers with large voids derived from the U3O8 structure formed exclusively by pentagonal UrO5 bipyramids. The low-occupied Rb sites are located in the interlayer space. The SiO4 silicate tetrahedra in the structure of 1 share vertices to form rolled [Si6O16]8- chains. The nanotubules [(UO2)(Si6O16)]6- penetrate through both U3O8-derived layers and Rb interlayer. These tubules are attached to the U3O8 derived sheets via uranyl-uranyl interactions and edge-sharing between silicate tetrahedra and UrO5 bipyramids.
KW - inorganic synthesis
KW - microporous structures
KW - nanotubules
KW - silicates
KW - uranyl oxysalts
UR - https://www.mendeley.com/catalogue/971ee98d-1e6e-39fc-b913-e1a5199afc46/
U2 - 10.1515/zkri-2023-0019
DO - 10.1515/zkri-2023-0019
M3 - Article
JO - Zeitschrift fur Kristallographie - Crystalline Materials
JF - Zeitschrift fur Kristallographie - Crystalline Materials
SN - 2194-4946
ER -
ID: 108473138