Synthesis of a Se0/Calcite Composite Using Hydrothermal Carbonation of Ca(OH)2 Coupled to a Complex Selenocystine Fragmentation G. Montes-Hernandez,*,† A. Ferna´ndez-Martı´nez,†,‡ L. Charlet,† F. Renard,§,| A. C. Scheinost,⊥,# and M. Bueno∇
CRYSTAL GROWTH & DESIGN 2008 VOL. 8, NO. 7 2497–2504
LGIT, UniVersity Joseph Fourier, ObserVatoire de Grenoble and CNRS, BP 53 X, 38420 Grenoble Cedex 9, France, Institute of Radiochemistry, FZD, Dresden, Germany, The Rossendorf Beamline at ESRF, 6 rue Jules Horowitz, BP 220, 38043 Grenoble Cedex, France, LGCA, UniVersity Joseph Fourier, ObserVatoire de Grenoble and CNRS, BP 53 X, 38420 Grenoble Cedex 9, France, Physics of Geological Processes, UniVersity of Oslo, Norway, LCABIE, IPREM, UMR CNRS 5254, UniVersite´ de Pau et des Pays de l’Adour, He´lioparc Pau-Pyre´ne´es, 2 aVenue du Pre´sident Angot, 64000 Pau, France, and Institut Laue-LangeVin, B.P. 156, 38042 Grenoble Cedex 9, France ReceiVed February 5, 2008; ReVised Manuscript ReceiVed April 4, 2008
ABSTRACT: Elemental selenium (Se0)/calcite composites were synthesized in a batch system by hydrothermal carbonation of calcium hydroxide under high CO2-Ar pressure (90 bar) and high temperature (90 °C) coupled to a complex selenocystine fragmentation. Under O2-poor conditions, the composite consisted predominantly of spherical, amorphous nanoparticles of elemental red selenium (
