issue contents

Journal logoSTRUCTURAL
ISSN: 2053-2296

May 2010 issue

Highlighted illustration

Cover illustration: Two-dimensional isostructurality among polymorphs of benzene-1,2-diamine, showing (top) the crystal packing in one polymorph, viewed down the a axis, and (bottom) the crystal packing in a second polymorph, viewed down the b axis. Hydrogen bonds are shown as dotted lines. See Czapik & Gdaniec [Acta Cryst. (2010), C66, o198-o201].

inorganic compounds

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The title structure is a new modification of Tl2CrO4. It is closely related to the already known modification which belongs to the β-K2SO4 family, but it differs in the number of independent cations and anions: there are four independent Tl+ cations and two [CrO4]2− anions in the title structure, in contrast with the β-K2SO4 family where there are two independent cations and one anion.

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The structure of the title compound, in the space group F23, is related to a cubic perovskite, with isolated RuO6 octa­hedra and distorted O polyhedra around Al. The La and Sr atoms share the same sites.

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The monoclinic structure (C2/c) of the title compound is built up from layers of PO4 and ZnO4 vertex-sharing tetra­hedra parallel to the bc plane with inter­layer ZnO2(N/O)2 tetra­hedra. Neighbouring layers are linked via Zn—O—P bridges. Hydrogen bonding and weaker electrostatic contacts are present between adjacent ZnO2(N/O)2 tetra­hedra and between these tetra­hedra and the layers parallel to the bc plane.

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The Cu2Se3Sn structure investigated in this paper is a superstructure of the cubic and monoclinic modifications reported earlier. The eight independent Cu atoms and four independent Sn atoms occupy, respectively, one-third and one-sixth of the tetra­hedral holes in a pseudo-close-packed Se lattice. The cation positions are fully ordered.

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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