issue contents
May 1995 issue
inorganic compounds
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The structure of CeMo8O14 contains an equal mixture of cis-edge-sharing and trans bicapped octahedral Mo8 clusters arranged in layers. The oxygen framework derives from close-packed layers with the sequence ABAC. The Ce3+ ions are surrounded by 12 O atoms forming a distorted cuboctahedron.
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The structure of the pyrochlore Y2Ru2O7 was determined by Rietveld analysis of time-of-flight neutron powder diffraction data. Each Ru atom has a nearly regular octahedral coordination environment whereas each Y atom has distorted eightfold coordination geometry.
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Structure refinements of Mn3Al10 were performed in the space groups Pnma and Pn21a. All atom sites in Pn21a were within 3σ from those in Pnma, except for three Al positions, which were within 6σ. The space group Pnma was found to be correct.
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The structure of K3Nb3O6Si2O7 is built up from Si2O7 ditetrahedra and groups of three corner-linked NbO6 octahedra. The framework is isotypic with that of Ba3Nb6O12(Si2O7)2, but the filling of the tunnels with K+ ions rather than Ba2+ ions determines the space group to be P\=62c.
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The structure of this new vanadium(III) monophosphate contains [VO4]∞ rutile chains and VPO8 units, each formed from a VO6 octahedron sharing an edge with a PO4 tetrahedron.
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The structure of (NH3OH)2SO4 consists of sulfate and hydroxylammonium ions, which are connected by O-H⋯O and N-H⋯O hydrogen bonds. All O atoms of the sulfate groups are involved in two hydrogen bonds.
metal-organic compounds
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organic compounds
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