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Figure 1 Structural unit of (NH4)2[FeII3(H2O)2(P2O7)2], showing the coordination environments of Fe and P atoms. Thermal ellipsoids at the 50% probability level. Green sphere: Fe atom, purple sphere: P atom, red sphere: O atom, blue sphere: N atom, dark grey sphere: H atom. Symmetry codes: (i) x, –y + [{3\over 2}], z + [{1\over 2}]; (ii) –x + 2, –y + 1, –z + 1; (iii) –x + 2, y + [{1\over 2}], –z + [{1\over 2}]; (iv) x, –y + [{1\over 2}], z + [{1\over 2}]

ISSN: 2056-9890
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