Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Effect of solution acidity on the crystallization of polychromates in uranyl-bearing systems : Synthesis and crystal structures of Rb2[(UO2)(Cr2O7)(NO3)2] and two new polymorphs of Rb2Cr3O10. / Nazarchuk, Evgeny V.; Siidra, Oleg I.; Charkin, Dmitry O.; Kalmykov, Stepan N.; Kotova, Elena L.
в: Zeitschrift fur Kristallographie - Crystalline Materials, Том 236, № 1-2, 26.01.2021, стр. 11-21.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Effect of solution acidity on the crystallization of polychromates in uranyl-bearing systems
T2 - Synthesis and crystal structures of Rb2[(UO2)(Cr2O7)(NO3)2] and two new polymorphs of Rb2Cr3O10
AU - Nazarchuk, Evgeny V.
AU - Siidra, Oleg I.
AU - Charkin, Dmitry O.
AU - Kalmykov, Stepan N.
AU - Kotova, Elena L.
N1 - Funding Information: Technical support by the SPbSU X-ray Diffraction and Microscopy and Microanalysis Resource Centers is gratefully acknowledged. Publisher Copyright: © 2021 De Gruyter. All rights reserved. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/1/26
Y1 - 2021/1/26
N2 - Three new rubidium polychromates, Rb2[(UO2) (Cr2O7)(NO3)2] (1), γ-Rb2Cr3O10 (2) and δ-Rb2Cr3O10 (3) were prepared by combination of hydrothermal treatment at 220 °C and evaporation of aqueous solutions under ambient conditions. Compound 1 is monoclinic, P21/c, a = 13.6542(19), b = 19.698(3), c = 11.6984(17) Å, β = 114.326(2)°, V = 2867.0(7) Å3, R1 = 0.040; 2 is hexagonal, P63/m, a = 11.991(2), c = 12.828(3) Å, γ = 120°, V = 1597.3(5) Å3, R1 = 0.031; 3 is monoclinic, P21/n, a = 7.446(3), b = 18.194(6), c = 7.848(3) Å, β = 99.953(9)°, V = 1047.3(7) Å3, R1 = 0.037. In the crystal structure of 1, UO8 bipyramids and NO3 groups share edges to form [(UO2)(NO3)2] species which share common corners with dichromate Cr2O7 groups producing novel type of uranyl dichromate chains [(UO2)(Cr2O7)(NO3)2]2−. In the structures of new Rb2Cr3O10 polymorphs, CrO4 tetrahedra share vertices to form Cr3O102− species. The trichromate groups are aligned along the 63 screw axis forming channels running in the ab plane in the structure of 2. The Rb cations reside between the channels and in their centers completing the structure. The trichromate anions are linked by the Rb+ cations into a 3D framework in the structure of 3. Effect of solution acidity on the crystallization of polychromates in uranyl-bearing systems is discussed.
AB - Three new rubidium polychromates, Rb2[(UO2) (Cr2O7)(NO3)2] (1), γ-Rb2Cr3O10 (2) and δ-Rb2Cr3O10 (3) were prepared by combination of hydrothermal treatment at 220 °C and evaporation of aqueous solutions under ambient conditions. Compound 1 is monoclinic, P21/c, a = 13.6542(19), b = 19.698(3), c = 11.6984(17) Å, β = 114.326(2)°, V = 2867.0(7) Å3, R1 = 0.040; 2 is hexagonal, P63/m, a = 11.991(2), c = 12.828(3) Å, γ = 120°, V = 1597.3(5) Å3, R1 = 0.031; 3 is monoclinic, P21/n, a = 7.446(3), b = 18.194(6), c = 7.848(3) Å, β = 99.953(9)°, V = 1047.3(7) Å3, R1 = 0.037. In the crystal structure of 1, UO8 bipyramids and NO3 groups share edges to form [(UO2)(NO3)2] species which share common corners with dichromate Cr2O7 groups producing novel type of uranyl dichromate chains [(UO2)(Cr2O7)(NO3)2]2−. In the structures of new Rb2Cr3O10 polymorphs, CrO4 tetrahedra share vertices to form Cr3O102− species. The trichromate groups are aligned along the 63 screw axis forming channels running in the ab plane in the structure of 2. The Rb cations reside between the channels and in their centers completing the structure. The trichromate anions are linked by the Rb+ cations into a 3D framework in the structure of 3. Effect of solution acidity on the crystallization of polychromates in uranyl-bearing systems is discussed.
KW - Hexavalent chromium
KW - Polychromates
KW - Rubidium
KW - Uranium
KW - URANIUM
KW - TOPOLOGY
KW - BIDENTATE COORDINATION
KW - hexavalent chromium
KW - CHEMICAL FEATURES
KW - MOLYBDATES
KW - CHROMATES
KW - RB
KW - TUNGSTATES
KW - rubidium
KW - CHEMISTRY
KW - polychromates
KW - uranium
KW - CATION
UR - http://www.scopus.com/inward/record.url?scp=85100491942&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/1c267a81-4d24-3450-92b4-7cd4f2f765e0/
U2 - 10.1515/zkri-2020-0078
DO - 10.1515/zkri-2020-0078
M3 - Article
AN - SCOPUS:85100491942
VL - 236
SP - 11
EP - 21
JO - Zeitschrift fur Kristallographie - Crystalline Materials
JF - Zeitschrift fur Kristallographie - Crystalline Materials
SN - 2194-4946
IS - 1-2
ER -
ID: 74421581