Abstract
Abstract A synthetic Cs-fluorohectorite was intercalated with Tetramethylammonium-cations (TMA+). Under appropriate reaction conditions, a complete cation exchange is feasible while preserving the phase relationship between adjacent silicate layers. Starting from a three-dimensionally (3D) ordered [1] and homogeneously charged [2], synthetic Cs-hectorite it is possible to synthesize single crystals of a 3D ordered intercalation compound (TMA-hectorite). Single crystal structure refinement (TMA0.5 interMg2.5Li0.5 octSi4 tetO10F2, monoclinic, C2/m, a = 5.2735(11) Å, b = 9.1165(14) Å, c = 13.5609(35) Å, β = 97.693(3)°, V = 646.1(2) Å3, Z = 2) conclusively reveals the arrangement of the TMA-cations in the interlayer space. The results are compared with an earlier structure refinement of an analogous TMA-intercalated natural vermiculite [3] and the results of a computer simulation carried out on TMA-vermiculite [4].
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