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May 2009 issue
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Cover illustration: The molecular structure of diphenyldipyridinezinc(II). Displacement ellipsoids are drawn at the 50% probability level. All H atoms have been omitted. The central Zn atom displays a distorted tetrahedral coordination geometry. See Lennartson & Håkansson [Acta Cryst. (2009), C65, m205-m207].
inorganic compounds
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The crystal structure of GeTe2O6, a phase already known but previously indexed in the wrong unit cell and symmetry, has been determined from single-crystal data in the P21/n space group. It consists of a three-dimensional framework of isolated GeO6 octahedra connected only via isolated TeO3 units.
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The structure contains two unique cages built with a hydrogen-bond network, and octahedral environments of niobium and scandium to encapsulate the potassium cations.
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Li2Zn3(P2O7)2 has two symmetry-independent sites for Zn atoms; one is fully occupied and the other is disordered as Zn2+ and Li+ in a 1:1 ratio. [ZnO5] bipyramids build up infinite zigzag chains by sharing edges with each other. Half of the Li+ cations are disordered on Zn sites and the other half occupy symmetry-independent positions, with site-occupancy factors of 0.5.
metal-organic compounds
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organic compounds
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