“…Computer simulations have indicated that these could occur as a regular chain structure, with percolation at x ¼ 1 2 resulting in infinite straight chains of metaloxygen octahedra containing divalent cations alternating with others containing trivalent cations (Xiao et al, 1999). Ruby et al (2010) claim to have produced Fe 2+ -Fe 3+ LDH phases (i.e. the so-called 'green rust') that have values of x of 0, 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;MgGa: Bellotto et al, 1996; Ló pez-Salinas et al, 1997.…”