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Figure 3 The crystal structure of (NH4)2[FeII3(H2O)2(P2O7)2] is built from zigzag chains of edge-sharing iron octa­hedra linked by P2O7 pyrophosphate groups to form layers parallel to (100), which are further linked by ammonium ions, sitting at the inter­layer space, via the hydrogen bonds. Green octa­hedron: FeO6, orange tetra­hedron: PO4, blue sphere: N atom, dark grey sphere: H atom.

Journal logoCRYSTALLOGRAPHIC
COMMUNICATIONS
ISSN: 2056-9890
Volume 68| Part 1| December 2012| Pages i5-i6
doi:10.1107/S1600536811052482
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