Fig. 1: X-ray diffraction results and schematic crystal structure of β-ThRh1−xIrxGe.

a Room temperature XRD patterns for the series of polycrystalline β-ThRh1−xIrxGe samples. The diffraction peak due to the ThRh/ThIr impurity is marked by the asterisk. b Schematic structure of β-ThRh1−xIrxGe. The Th, Rh/Ir and Ge atoms are marked by the arrows. c Ir content x dependence of the orthorhombic lattice constants.