Rearrangement of cationic surfactants in magadiite

Partly loaded magadiite samples have been prepared from a synthetic sodium magadiite, 0.9 Na2O 13.9 SiO2 9.3 H2O, by a two-step intercalation process using n-cetylpyridinium (CP) chloride asa model surfactant. Usually, partly loading with long-chain organic cations yields a non-uniform distribution of the surfactant molecules in the interlamellar space of the layered silic ates. The resulting samples contain fully expanded crystals or zones within the crystals besides unreacted crystals or domains. After equilibration in water the partly loaded samples transform into products with a uniform exp ansion of all interlayer spaces due to rearrangement of the CP cations with in and between the interlayer spaces.