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Figure 3
Polyhedral structure representations. (a) The model structure for β-Zn(OH)2 developed during this work. (b) M(OH)2·H2O, i.e. α-M(OH)2. (c) An LDH phase with x = 0.333. The spheres represent M2+ (grey), M3+ (blue), O2− (red), C4+ (black), H+ (pink) and the O atoms of water molecules (brown). Lattice parameters and atomic coordinates are given in Table 1[link] for the β-Zn(OH)2 and Tables 2[link] and 3[link] for the model LDH phases. All structures are drawn to the same scale (a scale bar is inset in Fig. 3[link]a). The structures are all viewed along b with c up the page. A unit cell for β-Zn(OH)2 is outlined in Fig. 3[link](a): the length of the vertical line is c and the horizontal line is a cos (30). For the LDH phases, the layer spacing, c′, and the thickness of the main layer, h(oct), i.e. the distance between the two planes of O atoms that form the octahedral layer, are indicated in Fig. 3[link](b).

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
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