Cell + Ionic relaxation with Orb v3 conservative inf MPA; 0.03 eV/Å threshold; final energy = -48.2584 eV; energy change = -64.4488 eV; symmetry: P6_3/mmc → P-1
ScH6 in P63/mmc symmetry at 140 GPa, from Belli, Zurek & Errea (npj Comput. Mater. 2026). AB class: QNEs enhance Tc (88 to 99 K).