Symmetrization of Strong Hydrogen Bond under High Pressure in Bihydroxide-Ion-Containing NaCu2(SO4)2·H3O2 Revealed by Experimental Charge Density, Single-Crystal Electron Diffraction, and Neutron Diffraction Studies - Piotr Rejnhardt; Roman Gajda; Magdalena Woińska; Jan Parafiniuk; Gerald Giester; Ronald Miletich; Yan Wu; Tomasz Poręba; Mohamed Mezouar; Szymon Sutuła; Tomasz Góral; Przemysław Dera; et al. (Journal of the American Chemical Society, 2025)