Figure 6
The lattice parameters of hydrotalcite-like phases. (a) The a parameter plotted against x for a range of Mg–Al (open circles) and Mg–Ga (filled circles) LDH preparations reported in the literature; the data for the Mg–Al LDH involve a variety of interlayer anions (i.e. OH−, CO32-, NO3-, Cl−) and are from: Mg–Al: Bellotto et al. (1996 ); Bîrjega et al. (2005 ); Brindley & Kikkawa (1979 ); Budhysutanto et al. (2011 ); Gastuche et al. (1967 ); Han et al. (1998 ); Jinesh et al. (2010 ); Kaneyoshi & Jones (1999 ); Kukkadapu et al. (1997 ); Mascolo & Marino (1980 ); Miyata (1980 ); Pausch et al. (1986 ); Rao et al. (1998 ); Sato et al. (1988 ); Shen et al. (1994 ); Valente et al. (2011 ); Xu & Zeng (2001 ); Yun & Pinnavaia (1995 ); Mg–Ga: Bellotto et al. (1996 ); López-Salinas et al. (1997 ). (b) The Mg–Al data from Fig. 6 (a) together with two dotted lines that represent the best value of α ± 0.5%. This corresponds to a difference in α of only 1°, i.e. the dotted lines are for α = 96.92 and 97.89°. (c) The c′ parameter plotted against x for a range of Mg–Al–CO3 (open circles) and Mg–Ga–CO3 (filled circles) LDH preparations reported in the literature. Data are from: Mg–Al: Bellotto et al. (1996 ); Bîrjega et al. (2005 ); Brindley & Kikkawa (1979 ); Budhysutanto et al. (2011 ); Gastuche et al. (1967 ); Iyi et al. (2007 ); Iyi & Sasaki (2008 ); Jinesh et al. (2010 ); Miyata (1980 ); Pausch et al. (1986 ); Rao et al. (1998 ); Sato et al. (1988 ); Shen et al. (1994 ); Valente et al. (2011 ); Yun & Pinnavaia (1995 ); Mg–Ga: Bellotto et al. (1996 ); López-Salinas et al. (1997 ). (d) The a parameter plotted against x for Mg–Al,Fe LDH preparations. The lines are explained in the text. The data are from Rozov et al. (2010 ) (open circle), Manohara et al. (2011 ) (open square) and Meng et al. (2004 ) (filled square). |