| Abstract
| - Single crystals of pure silica zeolite SSZ-55 were prepared using the fluoride route. Single-crystal X-raydiffraction at a synchrotron source revealed the framework structure of the material, but the unit cell(orthorhombic a = 12.905(2) Å, b = 21.344(4) Å, c = 5.1279(10)) is too small to accommodate orderedarrays of the organic structure-directing agent. Molecular modeling was used to simulate the docking of thestructure-directing agent in the channels of the material, and this revealed a strong space-filling interactionwith a number of possible orientations of the organic cation. The overall non-centrosymmetric structure ofthe solid (spacegroup C2221) was confirmed using second harmonic generation experiments.
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