A systematic approximate method for the determination of structure factors from a powder diffractogram and its application to the solution of the structure of metavariscite

A systematic method for the approximate determination of structure factors based on measurements of the diffraction profiles of indexed powder diffractograms is described. This method, is based on considerations concerning the shape and size of the crystals, and may be applicable to the determination of some structures of low complexity. The method is tested by its application to the metavariscite structure. Results were obtained close to those calculated by single crystal techniques.