New ordered phase in the quasi-binary UAl₃-USi₃ system

Current research was performed with the purpose of solving the structure of a new ordered phase revealed in the quasi-binary UAl₃-USi₃ system. The final atomic model derived from a combination of electron and powder X-ray diffraction data could be explained by theoretical crystallography through a Bärnighausen tree, using the UAl₃ structure as an aristotype.