title: An analytical approach to determine the pore shape and size of MCM-41 materials from X-ray diffraction data.
abstract: The pore shape and size of MCM-41 were studied analytically by comparing the observed powder X-ray diffraction intensities with that derived from the MCM-41 crystal structure models, with two different pore shapes, a hexagon and a circle. The powder diffraction patterns from the as-synthesized and the calcined MCM-41 were measured by a synchrotron radiation at SPring-8, Japan. The MCM-41 structure with circular and hexagonal pore shapes explains well for the as-synthesized and the calcined MCM-41 crystals, respectively. The pore size and boundary obtained by this approach agree with those obtained from an N2 gas adsorption measurement combined with the Fourier synthesized density map.
authors.affiliation: Structural Chemistry, Arrhenius Laboratory, Stockholm University, 10691 Stockholm, Sweden.
authors.forename: Norihiro
authors.initials: N
authors.lastname: Muroyama
authors.forename: Tetsu
authors.initials: T
authors.lastname: Ohsuna
authors.forename: Ryong
authors.initials: R
authors.lastname: Ryoo
authors.forename: Yoshiki
authors.initials: Y
authors.lastname: Kubota
authors.forename: Osamu
authors.initials: O
authors.lastname: Terasaki