Synthesis and crystal structure of ULM-16, a new open-framework fluorinated gallium phosphate with 16-ring channels: Ga4(PO4)4F2·1.5NC6H14· 0.5H2O·0.5H3O
- 1 January 1996
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Materials Chemistry
- Vol. 6 (6), 1073-1074
- https://doi.org/10.1039/jm9960601073
Abstract
The synthesis and single-crystal X-ray structure of ULM-16, a new fluorinated gallophosphate Ga4(PO4)4F2·1.5NC6H14·0.5H2O·0.5H3O is described. This material is prepared hydrothermally at 180 °C using cyclohexylamine as structuring agent. It crystallizes in the orthorhombic space group Pbcn(no. 60) with a= 27.329(4), b= 17.377(2), c= 10.2124(5)Å, V= 4849.6(9)Å3 and Z= 8, with R= 0.0477 for 3006 observed reflections [I > 2σ(I)]. The structure is built up from vertex-linked GaO4 and PO4 tetrahedra, GaO4F trigonal bipyramids and GaO4F2 octahedra forming hexameric and tetrameric units. The three-dimensional framework consists of one-dimensional circular tunnels delimited by sixteen polyhedra and is stable up to 800 °C.Keywords
This publication has 11 references indexed in Scilit:
- Oxyfluorinated compounds with open structure XI. Interaction between the ULM-3 type framework and linear diamine templates of different chain lengths studied by X-ray diffraction and solid-state nuclear magnetic resonance characterizationMicroporous Materials, 1996
- Oxyfluorinated microporous compounds ULM-n: chemical parameters, structures and a proposed mechanism for their molecular tectonicsJournal of Fluorine Chemistry, 1995
- Oxyfluorinated Microporous Compounds: VII. Synthesis and Crystal Structure of ULM-5, a New Fluorinated Gallophosphate Ga16(PO4)14(HPO4)2(OH)2F7, [H3N(CH2)6NH3]4, 6 H2O with 16-Membered Rings and Both Bonding and Encapsulated F1Journal of Solid State Chemistry, 1994
- Chapter 1 Introduction to large pore molecular sievesCatalysis Today, 1994
- PrefaceZeolites, 1992
- A synthetic gallophosphate molecular sieve with a 20-tetrahedral-atom pore openingNature, 1991
- Phase annealing in SHELX-90: direct methods for larger structuresActa Crystallographica Section A Foundations of Crystallography, 1990
- A molecular sieve with eighteen-membered ringsNature, 1988
- Topochemistry of zeolites and related materials. 1. Topology and geometryChemical Reviews, 1988
- New Route to Pentasil-Type Zeolites Using a Non Alkaline Medium in the Presence of Fluoride IonsStudies in Surface Science and Catalysis, 1986