New orthorhombic phase in U-Fe-Al-Si system

▶ In this paper we report on the results of structure investigation of a new quaternary phase observed in U-Fe-Al-Si system. ▶ The composition of this phase is: U-18.6 at% Fe-29.2 at% Al-32.6 at% Si. ▶ This phase is orthorhombic and its symmetry can be described by the Immm space group. ▶ The unit cell parameters of the new phase are: a = 12.241 Å, b = 18.362 Å and c = 4.066 Å. ▶ Structural investigations were performed using electron microscopy, X-ray powder diffraction, conventional and convergent beam electron diffraction techniques.