Hydrogen uranyl arsenate

The compounds with the autunite-type sheet and monovalent interlayer cations are listed in Table 10 (phosphates) and in Table 11 (arsenates). In the two isostructural Li-bearing uranyl compounds [110, 119], Li is in fourfold coordination by H2O groups in the interlayer region. Hydrogen bonds link the H2O groups into square-planar sets, which are connected via the Li-0 bonds (Fig. 29). Hydrogen bonds extend from these sets to the anions at the equatorial vertices of uranyl square bipyramids, which are also shared with tetrahedra. 

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