“…If the IL content reaches 40-70%, new scattering sharp peaks appear. The values of the scattering vector q corresponding to the scattering peaks of the sample with 60% IL obey 1:2:3 relationship, which is known to be characteristic of lamellar periodicity, indicating that these four samples are lamellar phase [20][21][22]. It can be seen that the first-order scattering peak shifts to lower q values (1.54, 1.52, 1.50 and 1.45 nm À1 ) with increasing the IL content from 40% to 70%, the layer spacing (d) is calculated to be 4.08, 4.13, 4.19 and 4.33 nm, respectively.…”