Crystal structure of zeolite MCM-35 (MTF)

Zeolite MCM-35 may be crystallized in its pure silica form in fluoride or h ydroxide media at relatively low pH (below 11) in the presence of hexamethy leneimine. Its crystal structure has been solved by direct methods and refi ned using synchrotron powder diffraction data. Calcined MCM-35, [Si44O88], has a new zeolite topology (monoclinic, space group C2/m, a = 9.49998 Angst rom, b = 30.7096 Angstrom, c = 7.31333 Angstrom, beta = 91.7113 degrees) an d contains small one-dimensional pores with openings defined by windows of eight tetrahedra.