Structure determination of an alloy phase from electron diffraction intensities: comparison of spot pattern, convergent beam and the precession techniques

摘要

The structure of the metastable intermetallic phase Al_mFe has been investigated by electron diffraction techniques: selected area spot pattern, convergent beam electron diffraction and especially precession technique which is used for collection of three-dimesional intensity data. A structure model for the tetragonal Al_m,Fe-phase (a=8.84A, c=21.6A; m=4.4) in the space group I42m is proposed from Patterson syntheses and Fourier computations.