Single-crystal-like diffraction data from polycrystalline materials
A method for solving structures from powder diffraction data was developed, and its validity was demonstrated on three complex structures. The method uses a textured sample and exploits the high intensity and parallel nature of synchrotron radiation. In principle, crystal structures as complex as those routinely solved by single-crystal methods can be determined with this approach. For example, the as-synthesized form of the zeolite UTD-1, with 69 nonhydrogen atoms in the asymmetric unit, could be solved directly. With this method, a larger range of structural complexity becomes accessible to scientists interested in the structures of polycrystalline materials that cannot be grown as single crystals.
Wessels
T
Laboratorium fur Kristallographie, Eidgenossische Technische Hochschule, CH-8092, Zurich, Switzerland.
Baerlocher
C
McCusker
LB