issue contents

Journal logoSTRUCTURAL
ISSN: 2053-2296

February 1995 issue

Highlighted illustration

Cover illustration: 2'-carbamate taxol, see Gao & Golik, pages 295--298. The displacement ellipsoids are shown at the 50% probability level.

inorganic compounds

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The structure consists of chains of octahedrally and tetrahedrally arranged O atoms around Sc and S atoms, respectively. These chains are hydrogen bonded by the hydroxylammonium ions and the water molecules.

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FeAl3Si2 is isotypic with PdGa5, but presents a superstructure (space group Pbcn). The structure may be described by the idealized formula FeAl(1)Al(2)2Si2, in which Fe and Al(1) are tenfold and Al(2) and Si are ninefold coordinated.

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KAlAs2O7 is isotypic with RbAlAs2O7. The structure consists of a covalent framework built up from corner-sharing AsO4 tetrahedra and AlO6 octahedra, and containing intersecting tunnels within which the K+ ions are located.

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LiBeAsO4.H2O is isostructural with other LiABO4.H2O Li–A-type molecular sieves. Geometrical parameters, derived from X-ray powder data, are typical for the ordered, alternating BeO4 and AsO4 groups in this phase.

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In SrBr2.6H2O, Sr has tricapped trigonal prismatic coordination geometry involving six bridging and three terminal water molecules, resulting in a linear polymeric cation of general formula [Sr(H2O)6]n2n+ with charges balanced by Br ions.

metal-organic compounds

organic compounds

addenda and errata

Acta Cryst. (1995). C51, 340
doi: 10.1107/S0108270195099781