Antonio Tilocca,1,* Nora H. de Leeuw,1,2 and Alastair N. Cormack1,3 1Department of Chemistry, University College London, London WC1H 0AJ, United Kingdom 2School of Crystallography, Birkbeck College, London WC1E 7HX, United Kingdom 3New York State College of Ceramics, Alfred University, Alfred, New York 14802, USA Received 24 October 2005; revised manuscript received 20 January 2006; published 3...
