Citation: Luis A. Villaescusa; Paul S. Wheatley; Ivor Bull; Philip Lightfoot; Russell E. Morris (2001). The Location and Ordering of Fluoride Ions in Pure Silica Zeolites with Framework Types IFR and STF; Implications for the Mechanism of Zeolite Synthesis in Fluoride Media. Journal of the American Chemical Society, 123, pp. 8797-8805.