Determination of the crystal structure of the pi-AlFeMgSi phase using symmetry- and site-sensitive electron microscope techniques.
نویسندگان
چکیده
The crystal structure of the complex pi-AlFeMgSi phase, which was previously thought to have the composition Al(8)FeMg(3)Si(6), has been investigated. Microprobe analysis revealed that the phase has a different composition, Al(9)FeMg(3)Si(5). The space group was determined and confirmed to be P62m with the use of parallel-beam electron diffraction (SAD) and convergent-beam electron diffraction (CBED). Owing to symmetry considerations the elements within the unit cell had to be rearranged. The rearrangement was confirmed using electron channelling. The z parameters of the elements were refined by examining the intensities from high-angle convergent-beam electron diffraction. Finally, the x parameters were adjusted slightly to arrive at acceptable interatomic distances.
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ورودعنوان ژورنال:
- Acta crystallographica. Section B, Structural science
دوره 59 Pt 1 شماره
صفحات -
تاریخ انتشار 2003