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Figure 3
The crystal packing of (III)[link], omitting the H atoms. The lanthanum ions and water mol­ecules of crystallization are depicted as small spheres. Note that the double polymeric chains are centred at z = 0 (and z = 1), while layers of the uncoordinated naphthalene­tetra­carboxylic acid ligand are centred at z = [{1\over 2}]. The latter are hydrogen bonded to the former with the aid of inter­stitial water molecules (Table 2[link]).

Journal logoSTRUCTURAL
CHEMISTRY
ISSN: 2053-2296
Volume 64| Part 7| June 2008| Pages m264-m266
doi:10.1107/S0108270108017691
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