Hydrotalcites are a class of layered double hydroxides (LDHs) with anionic interlayers. They are characterized by their brucite-like layers, where divalent metal cations are partially substituted by trivalent metal cations, creating a positive charge that is balanced by anions in the interlayer spaces. The general formula for hydrotalcites can be represented as [M2+1-xM3+x(OH)2]x+[An-x/n·mH2O]x-.
