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

Department of Chemistry, University of Warsaw, Pasteura 1, Warszawa 02-093, Poland

Roman Gajda

Department of Chemistry, University of Warsaw, Pasteura 1, Warszawa 02-093, Poland

Magdalena Woińska

Department of Chemistry, University of Warsaw, Pasteura 1, Warszawa 02-093, Poland

Jan Parafiniuk

Department of Geochemistry, Mineralogy and Petrology, Faculty of Geology, University of Warsaw, Żwirki i Wigury 93, 02-089 Warszawa, Poland

Gerald Giester

Department of Mineralogy and Crystallography, University of Vienna, Josef-Holaubek-Platz 2, Vienna A-1090, Austria

Ronald Miletich

Department of Mineralogy and Crystallography, University of Vienna, Josef-Holaubek-Platz 2, Vienna A-1090, Austria

Yan Wu

Tomasz Poręba

European Synchrotron Radiation Facility, 71, Avenue des Martyrs, CS 40220, 38043 Grenoble, Cedex 9, France

Mohamed Mezouar

European Synchrotron Radiation Facility ESRF, 71 Avenue des Martyrs, CSS40220, 38043 Cedex 9, Grenoble, France

Szymon Sutuła

Centre of New Technologies, University of Warsaw, S. Banacha 2c, 02-097 Warszawa, Poland

Tomasz Góral

Centre of New Technologies, University of Warsaw, S. Banacha 2c, 02-097 Warszawa, Poland

Przemysław Dera

Hawaii Institute of Geophysics and Planetology, School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, 1680 East West Road, POST Bldg, 819E, Honolulu, Hawaii 96822, United States

Krzysztof Woźniak

Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warszawa, Poland