Fig. 1: Cubic phase stabilization without vacancy formation.

a, b X-ray diffraction patterns of garnet with respect to number of dopants in Zr site. c, d X-ray and neutron diffraction patterns and Rietveld refinement of Li₇La₃Zr_0.4Hf_0.4Sn_0.4Sc_0.4Ta_0.4O₁₂.