Nanoscale Hemispheres in Novel Mixed-Valent Uranyl Chromate(V,VI), (C3NH10)10[(UO2)13(Cr125+O42)(Cr6+O4)6(H2O)6](H2O)6
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https://figshare.com/articles/dataset/Nanoscale_Hemispheres_in_Novel_Mixed_Valent_Uranyl_Chromate_V_VI_C_sub_3_sub_NH_sub_10_sub_sub_10_sub_UO_sub_2_sub_sub_13_sub_Cr_sub_12_sub_sup_5_sup_O_sub_42_sub_Cr_sup_6_sup_O_sub_4_sub_sub_6_sub_H_sub_2_sub_O_sub_6_sub_H_sub_2_sub_O_sub_6_sub_/2491741
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The structure of a novel mixed-valent chromium uranyl compound, (C3NH10)10[(UO2)13(Cr125+O42)(Cr6+O4)6(H2O)6](H2O)6 (1), obtained by the combination of a hydrothermal method and evaporation from aqueous solutions with isopropylammonium, contains uranyl chromate hemispheres with lateral dimensions of 18.9 × 18.5 Å2 and a height of about 8 Å. The hemispheres are centered by a UO8 hexagonal bipyramid surrounded by six dimers of Cr5+O5 square pyramids, UO7 pentagonal bipyramids, and Cr6+O4 tetrahedra. The hemispheres are linked into two-dimensional layers so that two adjacent hemispheres are oriented in opposite directions relative to the plane of the layer. From a topological point of view, the hemispheres have the formula U21Cr23 and can be considered as derivatives of nanospherical cluster U26Cr36 composed of three-, four-, and five-membered rings.
创建时间：
2016-02-20
