CsMgGa₅S₉: a diamond-like network formed by mixed tetrahedral units for excellent nonlinear optical properties

CsMgGa₅S₉ features a diamond-like framework with uniformly stacked mixed tetrahedral units and embedded Cs⁺ ions. It exhibits a favor second-harmonic generation response (0.5 × AgGaS₂@1910 nm) and a large bandgap...