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Figure 4
(a) The different layers parallel to the (100) plane, formed by the H2P2O62− anions in (III), joined via O—H⋯O hydrogen bonds (blue dashed lines in the electronic version of the paper). (b) Inter­layer connections via water-bridged hydrogen bonds (orange dashed lines) and coordination interactions with K+ cations. The [KO8] polyhedra based on K1 (dark blue) and K2 (light blue) are arranged within corrugated layers parallel to the (100) plane. [Symmetry codes: (i) −x + 1, −y + 1, −z; (ii) −x, −y + 1, −z + 1; (iv) −x + 1, −y + 1, −z + 1; (vi) x, y, z − 1; (ix) −x + 1, y − [{1\over 2}], −z + [{1\over 2}]; (x) x, −y + [{3\over 2}], z − [{1\over 2}].]

Journal logoSTRUCTURAL
CHEMISTRY
ISSN: 2053-2296
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