1. Chemical Analysis, Eka Chemicals AB, S-445 80 Bohus, Sweden, DiffAbs Beamline, Synchrotron Soleil, BP 48, 91192 Gif-sur-Yvette Cedex, France, Department of Chemistry, University of Antwerp (UIA), B-2610 Antwerp, Belgium, ISIS Department, CCLRC Rutherford Appleton Laboratory, Chilton Didcot, Oxfordshire, OX11 0QX, U.K., Laboratoire de Sciences de la Terre, École Normale Supérieure de Lyon, 46 allée d'Italie, 69007 Lyon, France, and Department of Inorganic Environmental Chemistry, Chalmers University of...