Figure 3
(a) The stacking sheets of (Fe0.81Al0.19)(H2PO4)3. (b) The structure of the series of compounds (NH4, H3O, K)(Fe,Al)3(HPO4)2(H2PO4)6·4H2O, with the water molecules lying in the interlayer space. (c) The two-dimensional layered compound (C6H8N)[Al2P3O10(OH)2], with the 4-methylpyridine lying in the interlayer space. |