Roberts, M.A. and Fitch, A.N. and Chadwick, A.V. (1995) The crystal-structures of (NH4)(3)HGE7016-center-dot-NH(2)O and Li4-xhxge7016-center-dot-NH(2)0 determined from powder diffraction data using synchrotron-radiation. Journal of Physics and Chemistry of Solids, 56 (10). pp. 1353-1358. ISSN 0022-3697.
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The structures of two hydrated microporous germanates (NH4)(3)HGe7O16. nH(2)O and Li4-xHxGe7O16. nH(2)O [n = 2.72(3) and 5.61(5), respectively], have been determined in space group P(4) over bar3$ m, Z = 1, with a = 7.71069(1) Angstrom and 7.71936(1) Angstrom respectively, from Rietveld refinement of powder diffraction patterns collected using synchrotron radiation. The profiles contain 119 and 104 reflections, respectively. The structure of these germanates consists of a three-dimensional framework with charge compensating cations and water molecules occupying the interconnecting channels. The ammonium cations occupy sites near the centre of a 3.3 Angstrom window and form a disordered hydrogen-bonded network with the water molecules. This is presumably responsible for the ionic conductivity observed in this material.
|Uncontrolled keywords:||MICROPOROUS MATERIALS; X-RAY DIFFRACTION; CRYSTAL STRUCTURE|
|Divisions:||Faculties > Science Technology and Medical Studies > School of Physical Sciences|
|Depositing User:||I.T. Ekpo|
|Date Deposited:||08 Jun 2009 20:51|
|Last Modified:||08 Jun 2009 20:51|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/18995 (The current URI for this page, for reference purposes)|
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