title: A layered fluorinated gallium phosphate organically templated by propane-1,3-diaminium, an analog of the aluminophosphate MIL-12: Ga2(PO4)F5.C3H12N2.
abstract: Crystals of the oxyfluorinated gallium phosphate MIL-12 (digallium phosphate pentafluoride propane-1,3-diaminium), (C3H12N2)[Ga2(PO4)F5], were synthesized hydrothermally at 453 K under autogenous pressure using propane-1,3-diamine as the structure-directing agent. The title compound is isomorphous with the aluminium phosphate having the MIL-12 structural type. The structure is built up from a two-dimensional anionic network intercalated by the diamine species. The inorganic layer is composed of corner-linked GaO2F4 octahedra and PO4 tetrahedra. The diprotonated diamine group is located on a mirror plane, between the inorganic sheets, and interacts preferentially via hydrogen bonding through the ammonium groups and the terminal F and bridging O atoms of the inorganic layer. One of the Ga atoms lies on an inversion centre and the other lies on a mirror plane, as does the P atom, two of the phosphate O atoms and one of the F atoms.
authors.affiliation: Institut Lavoisier, IREM, UMR CNRS 8637, Université de Versailles Saint-Quentin-en-Yvelines, 45 Avenue des Etats Unis, 78035 Versailles Cedex, France. loiseau@chimie.uvsq.fr
authors.forename: Thierry
authors.initials: T
authors.lastname: Loiseau
authors.forename: Gerard
authors.initials: G
authors.lastname: Ferey