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Lithium Sulfide, Li2S, is an anti-fluorite semiconductor with a band-gap of3.865 eV. It also has exactly the same valence electron count, Ne, and atomicnumber, Z, as magnesium diboride, MgB2. Both have almost the same formulaweight. This qualifies Li2S as a magnesium-diboride like material. Li2S passesthe same computational material specific test for superconductivity as MgB2.Using our recently developed symmetry rules for searching for superconductors,we predict that Li2S, with electronegativity of 1.5, will be superconductingwith a Tc of 33.8K, if double-gapped or 16.9K if single gapped.

Is Lithium Sulfide a MgB2-like Superconductor?