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Sergey V. Krivovichev, Peter Carman Burns
Geometrical isomerism in uranyl chromates
I. Crystal structures of (UO2)(CrO4)(H2O)2, [(UO2)(CrO4)(H2O)2](H2O) and [(UO2)(CrO4)(HThree uranyl chromate hydrates, (UO2)(CrO4)(H2O)2, [(UO2)(CrO4)(H2O)2](H2O) and [(UO2)(CrO4)(H2O)2]4(H2O)9, have been prepared by evaporation from aqueous solutions. The crystal structure of (UO2)(CrO4)(H2O)2 (monoclinic, C2/m, Z = 16, a = 16.786(2), b = 22.731(2), c = 6.9969(7) Å, β = 90.051(3)°, V = 2669.8(5) Å3) has been solved by direct methods and refined to R1 = 0.065, calculated for 6702 unique observed reflections (ΙFoΙ = 4σF). The crystal structure of [(UO2)(CrO4)(H2O)2](H2O) (monoclinic, P21, Z = 4, a = 9.7206(14), b = 7.1617(10), c = 11.0909(16) Å, β = 92.388(3)°, V = 771.43(19) Å3) has been solved by direct methods and refined to R1 = 0.052, calculated for 4879 unique observed reflections (ΙFoΙ = 4σF). The crystal structure of [(UO2)(CrO4)(H2O)2]4(H2O)9 (monoclinic, P21/c, Z = 4, a = 31.397(1), b = 7.1701(3), c = 16.2480(7) Å, β = 97.515(1)°, V = 3626.3(3) Å3) has been solved by direct methods and refined to R1 = 0.051, calculated for 8164 unique observed reflections (ΙFoΙ = 4σF).
Zeitschrift für Kristallographie, Oldenbourg Wissenschaftsverlag
Print ISSN: 0044-2968
Volume: 218, 08/2003
Pages: 568
Three uranyl chromate hydrates, (UO2)(CrO4)(H2O)2, [(UO2)(CrO4)(H2O)2](H2O) and [(UO2)(CrO4)(H2O)2]4(H2O)9, have been prepared by evaporation from aqueous solutions. The crystal structure of (UO2)(CrO4)(H2O)2 (monoclinic, C2/m, Z = 16, a = 16.786(2), b = 22.731(2), c = 6.9969(7) Å, β = 90.051(3)°, V = 2669.8(5) Å3) has been solved by direct methods and refined to R1 = 0.065, calculated for 6702 unique observed reflections (ΙFoΙ = 4σF). The crystal structure of [(UO2)(CrO4)(H2O)2](H2O) (monoclinic, P21, Z = 4, a = 9.7206(14), b = 7.1617(10), c = 11.0909(16) Å, β = 92.388(3)°, V = 771.43(19) Å3) has been solved by direct methods and refined to R1 = 0.052, calculated for 4879 unique observed reflections (ΙFoΙ = 4σF). The crystal structure of [(UO2)(CrO4)(H2O)2]4(H2O)9 (monoclinic, P21/c, Z = 4, a = 31.397(1), b = 7.1701(3), c = 16.2480(7) Å, β = 97.515(1)°, V = 3626.3(3) Å3) has been solved by direct methods and refined to R1 = 0.051, calculated for 8164 unique observed reflections (ΙFoΙ = 4σF).
Zeitschrift für Kristallographie, Oldenbourg Wissenschaftsverlag
Print ISSN: 0044-2968
Volume: 218, 08/2003
Pages: 568