Crystal Structure of Zeolite MCM-35 (MTF)

Zeolite MCM-35 may be crystallized in its pure silica form in fluoride or hydroxide media at relatively low pH (below 11) in the presence of hexamethyleneimine. Its crystal structure has been solved by direct methods and refined using synchrotron powder diffraction data. Calcined MCM-35, [Si 44 O 88 ], has a new zeolite topology (monoclinic, space group C 2/ m, a = 9.49998 Å, b = 30.7096 Å, c = 7.31333 Å, β = 91.7113°) and contains small one-dimensional pores with openings defined by windows of eight tetrahedra.