Figure 3
Plot of the bond angle [alpha] against r(M) for [beta]-M(OH)2 phases and for Ni-, Mg-, Zn- and Co-based LDH phases. The data point for Mg(OH)2 is an average value from six structure determinations: Catti et al. (1995BB9), Cerný et al. (1995BB11), Chakoumakos et al. (1997BB12), Desgranges et al. (1996BB15), Isetti (1965BB24), Zigan & Rothbauer (1967BB64). The other data points for [beta]-M(OH)2 phases are from: Kazimirov et al. (2010BB30, Ni(OH)2); Pertlik (1999BB45, Co(OH)2); Parise et al. (2000BB43, Fe(OH)2); Christensen & Ollivier (1972BB13, Mn(OH)2); Bertrand & Dusausoy (1970BB6, Cd(OH)2); Busing & Levy (1957BB8, Ca(OH)2). There are two data points for [beta]-Zn(OH)2: one calculated from Baneyeva & Popova's (1969BB2) structure that is labelled `Zn cBan' and a second from Richardson (2013BB50) that is labelled `Zn c1'. Unfilled circles represent the values for the LDH phases and the dotted line is the linear regression fit for those data (the equation is given in the text).  [article HTML]