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Title: A novel cesium hydroxygallophosphate with a layered structure built up of rutile ribbons: CsGa{sub 2}(OH){sub 2}[(PO{sub 4})H(PO{sub 4})]

A new cesium gallophosphate, CsGa{sub 2}(OH){sub 2}[(PO{sub 4})H(PO{sub 4})], with an original layer structure has been synthesized by hydrothermal route characterized by single-crystal X-ray diffraction (R=0.0344, R{sub w}=0.0319). Its structure crystallizes in the monoclinic space group P2{sub 1}/a with cell parameters a=16.079(6)A, b=5.9873(12)A, c=4.5033(15)A, {beta}=93.36(4){sup o} and Z=2. It consists of [Ga(OH)PO{sub 4}]{sub {approx}} layers built up of rutile ribbons interconnected through PO{sub 4} tetrahedra. The structure of CsGa{sub 2}(OH){sub 2}[(PO{sub 4})H(PO{sub 4})] is closely related to those of (NH{sub 4})Ga(OH)PO{sub 4} and (en)Ga{sub 2}(OH){sub 2}(PO{sub 4}){sub 2} (en=ethylenediamine [H{sub 3}N(CH{sub 2}){sub 2}NH{sub 3}]{sup 2+}). The three structures differ mainly from each other by the relative positions and the spacing of the successive layers, which are governed by different hydrogen bonding modes between [Ga(OH)PO{sub 4}]{sub {approx}} layers and the interleaved species. The title compound presents strong symmetric hydrogen bonds O-H-O which bridge two PO{sub 4} tetrahedra of two successive layers. As a consequence, the distance between the layers is significantly shorter than in the two other amine compounds.
Authors:
 [1] ;  [2] ;  [1]
  1. Laboratoire CRISMAT, UMR 6508 CNRS ENSICAEN, 6 Bd Marechal Juin, 14050 CAEN Cedex (France)
  2. Laboratoire CRISMAT, UMR 6508 CNRS ENSICAEN, 6 Bd Marechal Juin, 14050 CAEN Cedex (France). E-mail: anne.guesdon@ensicaen.fr
Publication Date:
OSTI Identifier:
20900912
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 179; Journal Issue: 12; Other Information: DOI: 10.1016/j.jssc.2006.08.002; PII: S0022-4596(06)00457-9; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CESIUM PHOSPHATES; GALLIUM PHOSPHATES; LAYERS; MONOCLINIC LATTICES; MONOCRYSTALS; RUTILE; SPACE GROUPS; X-RAY DIFFRACTION