issue contents
February 2004 issue
inorganic compounds
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The crystal structure of the title compound, prepared by reacting a mixture of K2S3, VP, P4S3 and S, consists of discrete [VS(PS4)2]4− anions, which are stacked along the direction of the crystallographic b axis and separated by K+ cations. In the anion, the V atom is connected to five S atoms within a square pyramid. The VS5 group shares common edges with two bidentate [PS4] tetrahedra.
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The crystal structure of a new indium holmium germanate, In1.06Ho0.94Ge2O7, belonging to the thortveitite structure type, is reported. The In3+ and Ho3+ cations occupy the same octahedral site, forming an hexagonal arrangement on the ab plane. In their turn, the hexagonal arrangements of (In/Ho)O6 octahedral layers are held together by sheets of isolated diortho groups comprised of double tetrahedra sharing a common vertex.
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Cs2Cr4O13 contains a [Cr4O13]2− anion with a zigzag-like structure, built from four corner-linked CrO4 tetrahedra, and has a structure type previously unknown among alkali tetrachromates.
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Single crystals of the high-temperature modification of zinc catena-polyphosphate, β-Zn(PO3)2, were grown from a melt and quenched from 1093 K to room temperature. The structure is built of corrugated (PO3)∞ polyphosphate chains linked by slightly distorted [ZnO4] tetrahedra into a three-dimensional network.
metal-organic compounds
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The diisopropylphosphite ligand coordinates to the CoIII atom via its P atom. The crystal structure is isomorphous with that of other cobalamins that adopt packing type II, with a Co—P bond length [2.227 (1) Å] similar to that found in other phosphitocobalamins.
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organic compounds
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