issue contents

Journal logoSTRUCTURAL
ISSN: 2053-2296

July 2002 issue

Highlighted illustration

Cover illustration: Packing diagram of 4,7-diiodo-2,1,3-benzothiadiazole, viewed along the c axis. Dotted lines show the short S...N and I...I contacts. See Tomura, Akhtaruzzaman, Suzuki & Yamashita [Acta Cryst. (2002), C58, o373-o375].

inorganic compounds

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The title compounds crystallize with Na and Ag sharing sites. The small differences in ionic radii of the two monocations do not lead to significant differences in the structural details. In the latter compound, the Cu atom lies on an inversion center.

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K2CsYb(PO4)2 crystallizes in the trigonal system in space group P\overline 3m1. The structure is built up from regular independent PO4 tetrahedra and LnO6 octahedra sharing corners and arranged in layers. The structure is similar to that of glaserite.

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Rietveld refinement shows that the structure of Tl3H(SO4)2 in the super-ionic phase consists of SO4 tetrahedra, between which Tl atoms are situated. The distortion of the SO4 tetrahedra in this crystal is less than that in isotypic crystals.

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The structure of the new magnesium nitridoboride MgNB9 consists of two layers alternating along the c axis. The NB6 layer, with B12 icosahedra, has the C2B13 structure type. Within this layer, boron icosahedra are bonded to N atoms, each coordinating to three boron polyhedra. Another MgB3 layer, with B6 octahedra, does not belong to any known structure type. The boron icosahedra and octahedra are connected to each other, thus forming a three-dimensional boron framework.

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The structure of sodium manganese arsenate (1.72/3.28/12) is similar to the alluaudite structure type, and consists of a complex network of edge-sharing MnO6 octahedral chains, linked together by AsO4 tetrahedra, forming two distinct channels, one containing Na+ cations and the other occupied statistically by Mn+ and Na+ cations.

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Single crystals of germanium(IV) tetrachloride, GeCl4, were grown at 193 K. In the crystal structure, the isolated mol­ecules have very well realised tetrahedral geometry.

metal-organic compounds

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Fluorinated gallium phenyl­phospho­nate exhibits a layered structure built up from zigzag chains of edge-sharing gallium octahedra, connected to phenyl­phosphonate groups.

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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