issue contents

Journal logoSTRUCTURAL
ISSN: 2053-2296

September 2003 issue

Highlighted illustration

Cover illustration: Part of the crystal structure of 1-(4-methyl­amino-1,2,5-thia­diazo­le-3-carbonyl)­thio­semicarbazide, showing the formation of an edge-fused chain of R22(8) and R22(10) rings along [100]. See Fonari, Simonov, Lipkowski & Yavolovskii [Acta Cryst. (2003), C59, o491-o493].

inorganic compounds

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The coordination about the central holmium(III) ion is eightfold in a square-antiprismatic arrangement, while the ruthenium(II) ion is octahedrally coordinated. Channels permeating the crystal lattice contain the potassium cations and two zeolitic water mol­ecules.

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A sample of hydro­nium perchlorate, H3O+·ClO4, crystallized from ethanol at ambient temperature, was found to be orthorhombic (space group Pnma) at both 193 and 293 K, with no phase transition observed in this temperature range. The hydro­nium and perchlorate ions lie across a mirror plane but it is not possible to define at either temperature a simple description of the H-atom positions due to the three-dimensional tumbling of the hydro­nium cation.

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The correct space group of crystalline NaPF6·H2O has been determined to be Pnna, rather than the group Imma that was originally reported in 1956. The Na+ and PF6 ions and the water mol­ecules form a three-dimensional network in the solid state.

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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