title: Crystallization of a Keplerate-type polyoxometalate into a superposed kagome-lattice with huge channels.
abstract: Crystal structures of two Sr(2+) salts of the Keplerate-type polyoxometalate, [Mo(VI)(72)Mo(V)(60)O(372)(CH(3)COO)(30)(H(2)O)(72)](42-), have been determined by single crystal X-ray diffraction. One compound exhibits a superposed kagome-lattice with huge channels whose diameters measure approximately 3.0 nm, while the arrangement of the Keplerate anions in the other compound approximates to a distorted cubic close packing.
authors.affiliation: Department of Chemistry and Materials Science, Tokyo Institute of Technology, 2-12-1-H-63 O-okayama, Meguro-ku, Tokyo 152-8551, Japan.  tozeki@cms.titech.ac.jp.
authors.forename: Masaki
authors.initials: M
authors.lastname: Saito
authors.forename: Tomoji
authors.initials: T
authors.lastname: Ozeki