Figure 4
(a) The structure of the silicate layer of RUB-18 (Vortmann et al., 1997), viewed perpendicular to the layer along the c axis. (b) Two adjacent silicate layers of the RUB-18 structure, with the hydrated sodium ions in the interlayer space. (c) The proposed structure of the C16NMe3+ surfactant-templated layered silicate material based on PXRD and solid-state NMR data. The curved dashed lines illustrate how the silicate layers may be distorted. From Brouwer et al. (2017). Used with permission. |