Computational insights into the structural, electronic, and optoelectronic properties of Sr2MgXO6 (X = S, Se) double perovskites: promising candidates for photovoltaic and optoelectronic applications. - Ullah, Sana; Shafiullah, Muhammad; H.-E., M. Musa Saad; Ali, Malak Azmat (Structural Chemistry, 2025)