issue contents

Journal logoSTRUCTURAL
ISSN: 2053-2296

July 2012 issue

Highlighted illustration

Cover illustration: A view of the three-dimensional hydrogen-bonded pts framework in 4,4'-bi(1H-pyrazol-2-ium) tetra­chlorido­aurate(III) chloride, down the c axis, showing how the tetra­chlorido­aurate(III) stacks are incorporated inside the channels. N atoms are shaded and dotted lines indicate hydrogen bonding. See Domasevitch [Acta Cryst. (2012), C68, m169-m172].

inorganic compounds

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X-ray diffraction reveals a new polymorph of volborthite in a single crystal prepared by hydro­thermal means. The structure is monoclinic (space group C2/c) at room temperature, with the unit cell doubled with respect to the previously reported C2/m structure.

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The structure of the compound Pb4.94(3)In3.05(3)Bi4.99(3)S17, a compositional variant of a new quaternary sulfide phase, is closely related to that of Pb4In3Bi7S18.

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In the title compound, each singly protonated diphospho­penta­molyb­date(VI) anion retains the typical geometry of a ring of five edge-sharing MoO6 octa­hedra, except for one corner-sharing link. Two capping PO4 tetra­hedra share corners with the five octa­hedra. Despite being surrounded by an extensive network of hydrogen bonds, predominantly from the guanidinium cations, short P—O—H⋯O=P contacts associate the anions into infinite columns generated by the c-glide.

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The title compound, Li0.97FeII0.79FeIII0.15(PO4), has been synthesized hydro­thermally at 973 K and 0.1 GPa. Its crystal structure is similar to that of natural triphylite and is characterized by two chains of edge-sharing octa­hedra parallel to the b axis. The M1 octa­hedra contain Li and vacancies, and the M2 octa­hedra contain FeII, FeIII and vacancies.

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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