期刊
CANADIAN MINERALOGIST
卷 43, 期 -, 页码 1839-1894出版社
MINERALOGICAL ASSOC CANADA
DOI: 10.2113/gscanmin.43.6.1839
关键词
uranium; actinide; crystal structure; structural hierarchy; nuclear waste
类别
The crystal structures of uranyl minerals and inorganic uranyl compounds are important for understanding the genesis of U deposits. the interaction of U mine and mill tailings with the environment, transport of actinides in soils and the vadose zone, the performance of geological repositories for nuclear waste-and for the development of advanced materials with novel applications. Over the past decade. the number of inorganic uranyl compounds (including minerals) with known structures has more than doubled. and reconsideration of the structural hierarchy of uranyl compounds is warranted. Here, 368 inorganic crystal structures that contain essential U6+ are considered (of which 89 are minerals). They are arranged oil the basis of the topological details of their Structural units, which are formed by the polymerization of polyhedra containing higher-valence cations. Overarching Structural categories correspond to those based upon isolated polyhedra (8). finite clusters (43). chains (57). sheets (204). and frameworks (56) of polyhedra. Within these categories. structures are organized and compared upon the basis of either their graphical representations. or in the case of sheets involving sharing of edges of polyhedra, upon the topological arrangement of anions within the sheets.
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