RIKISUKATTO TABLET

Layered double hydroxides(LDH) are a class ofionic solidscharacterized by a layered structure with the generic layer sequence [AcB Z AcB]n, where c represents positively charged layers of metalcations, A and B are layers ofhydroxide(OH−)anions, and Z are interlayers filled by‍‍‍‍‍‍​​​‍​​​​​​ various anions (ensuring the electroneutrality of the system) and neutral molecules such as water.Lateral offsets between the layers may result in longer repeating periods. The intercalated anions (Z) are weakly electrostatically bound, oftenexchangeable; theirintercalationproperties have scientific interest and industrial applications. LDHs occur in nature asminerals, as byproducts of themetabolismof certainbacteria, and also unintentionally in man-made contexts (e.g., archaeological sites), such as the products ofcorrosionof metallic artefacts.