2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/104328Compelling evidence for band-type conductivity and even bulk superconductivity below $T\_{\text{c}}\approx 8$ K has been found in $^{69,71}$Ga-NMR experiments in crystalline ordered, giant Ga$\_{84}$ cluster-compounds. This material appears to represent the first realization of a theoretical model proposed by Friedel in 1992 for superconductivity in ordered arrays of weakly coupled, identical metal nanoparticles.5 pages, 4 figuresStrongly Correlated ElectronsSuperconductivitytext