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It is shown, for the ®rst time, how pure decagonal Zn±Mg±Y can be prepared by melt spinning and annealing. Study of the phase formation was performed by diOE erential scanning calorimetry and the sample was further investigated by Xray and electron diOE raction. The lattice constants of the decagonal phase are a qˆ4 :592 A Ê and cˆ5:198 A Ê calculated from a physical space model, or a qˆ4 :485 A Ê and cˆ5:193 A Ê from a hyperspace model.

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The growth of crystals of the coordination polymer [CuC 12 H 8 N 4 O 2 ] n with one-dimensional magnetic properties is reported. Several approaches have been proposed and tested in order to diminish the growth anisotropy and plate-like crystals of an area measuring up to 250×100 µm 2 were grown. The structure and the composition of the crystals are slightly modified with respect to that of earlier synthesized powder. Instead of the water free triclinic phase a monoclinic phase, intercalated by water molecules, forms. In the new modification, the polymer chain layers are bound together by a network of hydrogen bonds, which are stronger than the usual Van der Waals interactions in the triclinic phase. The crystal morphology is plate-like instead of the earlier obtained spherulitic needles.