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Figure 8
The [(UO2)24(CO3)30O4(OH)12(H2O)8]32− cluster in ewingite (a), its skeletal representation (b), the U core (c; the U⋯U contacts shorter than 4 Å are shown as thick black lines; those between 4 and 6.2 Å as thin black lines; red and blue dots indicate centres of the U3 trimers and midpoints of the shared U⋯U edges of the U4 dihedra, respectively), and the arrangements of the red and blue dots that correspond to the intersection of tetrahedron and octahedron, respectively (d).

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
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