Al-Fe-Ge: Phase equilibria and new ternary compounds at 400 °C

•Isothermal section of Al-Fe-Ge at 400 °C presented.•Four new phases were found in the section.•Crystal structure of τ5 (Al1−xFeGe1+x) determined by powder XRD.•Crystal structure of τ7 (Al4.5−xFeGe1+x) determined by single crystal XRD.