Diiron pentaaluminide, Fe 2 Al 5 , M r =268.8, orthorhombic, Cmcm (No. 63), a=7.6559(8), b=6.4154(6), c=4.2184 (4) A, V=207. 19 (6) A 3 , Z=2, D x =4.23 (2), D m =4.20 (1) Mg m -3 , Mo Kα radiation, μ=8.2 mm -1 , F(000)=249.6, T=293 K, R=0.0229, wR=0.0270 for 137 unique reflections. The refined structure differs from the approximate structure proposed previously by an additional partially occupied atomic position
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Burkhardt et al. (1994) studied this question.
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