V. Alfredsson et al., HIGH-RESOLUTION TRANSMISSION ELECTRON-MICROSCOPY OF MESOPOROUS MCM-41TYPE MATERIALS, Journal of the Chemical Society, Chemical Communications, (8), 1994, pp. 921-922
High-resolution transmission electron microscopy of MCM-41 shows for t
he first time clearly the hexagonal shape of the pores, and allows dir
ect observation of the transition from a lamellar to the hexagonal pha
se.