issue contents

Journal logoSTRUCTURAL
ISSN: 2053-2296

May 2005 issue

Highlighted illustration

Cover illustration: A simulated precession photo of the h0l plane showing the twin relationship in reciprocal space as a twofold rotation about a*. The radii of the circles indicate the intensities of the reflections. The main twin domain is drawn in open circles; the minor twin domain, with a twin fraction of 0.319 (2), is drawn in filled circles. The approximate primitive subcell in reciprocal space, covering both twin domains, is obtained by halving a*. See Lutz, Spek, van der Wiel & van Walree [Acta Cryst. (2005), C61, o300-o302].

inorganic compounds

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Silver bismuth sulfide (3.5/7.5/13), Ag3.5Bi7.5S13, is the member with N = 8 of the homologous series [Bi2S3]2·[AgBiS2](N−1)/2. All octa­hedral metal positions in its structure show mixed occupancy between Ag and Bi.

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The first rubidium gallium triphosphate has been synthesized by solid-state reaction and studied by single-crystal X-ray diffraction. It crystallizes in the non-centrosymmetric orthorhombic space group C2221, forming infinite [GaP6O20] columns of PO4 and GaO4 corner-sharing tetra­hedra along c, linked through the apices with GaO6 octa­hedra.

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TiOBr at 17.5 K has a twofold superstructure of the crystal structure at room temperature, which indicates that TiOBr is in a spin-Peierls state at low temperatures.

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The crystal structure of Ba(ClO2)2·3.5H2O has been determined by single-crystal X-ray analysis at 150 K. The structure is layered and contains Ba2+ cations surrounded by O atoms in a bicapped square antiprismatic coordination environment.

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Lithium aluminium germanium, AlGeLi, crystallizes in two cubic dimorphs. The structure of the F\overline{4}3m form has been confirmed by both powder and single-crystal X-ray diffraction studies. The second dimorph, not previously identified, adopts a disordered centrosymmetric structure with space group Fm\overline{3}m.

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Rietveld refinement of a new strontium borophosphate shows that a BO4 tetra­hedron, of symmetry \overline 4, is surrounded by an array of four [PO4]3− tetra­hedra. Sr atoms occupy sites coordinated by eight or nine O atoms.

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The structure of lithium dioxomolybdenum arsenate oxide, Li(MoO2)2O(AsO4), consists of corner-shared Mo2AsO12 structural units which form layers. The Mo2AsO12 units result from the association of corner-shared AsO4 tetrahedra and Mo2O9 groups. The Li+ ions are located in the interlayer space.

metal-organic compounds

organic compounds

Special and virtual issues

Acta Crystallographica Section C is planning special issues on

The Structural Chemistry of Homogeneous and Heterogeneous Catalysts

NMR Crystallography.

Full details are available on the special issues page.

The latest virtual issue, featuring Coordination polymers and with an introduction by Len Barbour, was published in July 2014.

What are the 'most read' articles from the recent special issues?

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