Abstract
The structure of the intermetallic compound A13Zr has been studied at 293 K by single-crystal X-ray diffraction (Mo Ka radiation, ,~ -- 0.71069 A), powder neutron diffraction {A[Ge(711)] = 1.0867 A} and convergent-beam electron diffraction (CBED) (200 keV, A = 0.0251/k). The structure of AI3Zr comprises four close-packed metal sub-lattices and has the tetragonal space group 14/mmm with a = 3.9993 (5), c = 17.283 (2) A, V= 276.43 (6) ,~3, Z= 4, Dx=4.136gcm-3, /z=45.11cm-l. The new z coordinates of four A1 and four Zr atoms on the e position [ZA~(e)and Zzr(e)] were determined by singlecrystal X-ray diffraction: Zn~(e)=0.37498(5) and
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