Figure 1

(a) XRD patterns and (b) lattice parameters of Mg2Ge1−xBix samples obtained by Rietveld refinement. Note that the lattice parameters do not change upon greater Bi addition beyond 0.17 at.%.

(a) XRD patterns and (b) lattice parameters of Mg2Ge1−xBix samples obtained by Rietveld refinement. Note that the lattice parameters do not change upon greater Bi addition beyond 0.17 at.%.