Key points are not available for this paper at this time.
By a combination of X-ray and electron diffraction, the average structure of the intermetallic phase β-Al 4.5 FeSi has been determined. The crystals grown from the melt were generally of poor quality; the monoclinic space group A2/a was deduced from electron diffraction patterns obtained from small domains. X-ray diffraction data measured at T= 298 K with Mo Kα radiation (λ=0.71069 A) out to sin θ/λ=0.8 A -1 resulted in 1739 observed reflections, of which 980 were unique. Of these, 244 weak reflections affected by disorder were removed. Cell dimensions are a=6.161 (3), b=6.175 (3), c=20.813 (6) A, β=90.42 (3) o
Rømming et al. (Wed,) studied this question.