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Redetermination of AgNb(2)PS(10) revealing a silver deficiency.

Do J, Yun H - Acta Crystallogr Sect E Struct Rep Online (2009)

Bottom Line: These chains are connected via the statistically disordered Ag(+) ions, forming double layers.Adjacent layers are stacked solely through van der Waals forces into a three-dimensional structure.Short and long Nb-Nb distances [2.880 (1) and 3.770 (2) Å, respectively] alternate along the chain and S(2) (2-) and S(2-) anionic species are observed.

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ABSTRACT
In comparison with a previous crystallographic study [Goh et al. (2002 ▶). J. Solid State Chem.168, 119-125] of the title compound, silver diniobium tris-(disulfide) tetra-thio-phosphate(V), that reports a full occupation of the silver position and isotropic displacement parameters for the atoms, the current redetermination reveals a silver deficiency with a site-occupation factor of 0.88 (1) and reports all atoms with anisotropic displacement parameters. The structure of Ag(0.88)Nb(2)PS(10) is composed of (∞) (1)[Nb(2)PS(10)] chains, which are built up from pairs of distorted bicapped trigonal-prismatic [NbS(8)] polyhedra forming [Nb(2)S(12)] dimers and of tetra-hedral [PS(4)] groups. These chains are connected via the statistically disordered Ag(+) ions, forming double layers. Adjacent layers are stacked solely through van der Waals forces into a three-dimensional structure. Short and long Nb-Nb distances [2.880 (1) and 3.770 (2) Å, respectively] alternate along the chain and S(2) (2-) and S(2-) anionic species are observed.

No MeSH data available.


A view of the structure of Ag0.88Nb2PS10 down the b axis showing the double layers and the two-dimensional nature of the compound. Large and small filled circles are Nb and P atoms respectively; large open circles are S atoms; grey circles represent Ag atoms.
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Fap1: A view of the structure of Ag0.88Nb2PS10 down the b axis showing the double layers and the two-dimensional nature of the compound. Large and small filled circles are Nb and P atoms respectively; large open circles are S atoms; grey circles represent Ag atoms.


Redetermination of AgNb(2)PS(10) revealing a silver deficiency.

Do J, Yun H - Acta Crystallogr Sect E Struct Rep Online (2009)

A view of the structure of Ag0.88Nb2PS10 down the b axis showing the double layers and the two-dimensional nature of the compound. Large and small filled circles are Nb and P atoms respectively; large open circles are S atoms; grey circles represent Ag atoms.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2977382&req=5

Fap1: A view of the structure of Ag0.88Nb2PS10 down the b axis showing the double layers and the two-dimensional nature of the compound. Large and small filled circles are Nb and P atoms respectively; large open circles are S atoms; grey circles represent Ag atoms.
Bottom Line: These chains are connected via the statistically disordered Ag(+) ions, forming double layers.Adjacent layers are stacked solely through van der Waals forces into a three-dimensional structure.Short and long Nb-Nb distances [2.880 (1) and 3.770 (2) Å, respectively] alternate along the chain and S(2) (2-) and S(2-) anionic species are observed.

View Article: PubMed Central - HTML - PubMed

ABSTRACT
In comparison with a previous crystallographic study [Goh et al. (2002 ▶). J. Solid State Chem.168, 119-125] of the title compound, silver diniobium tris-(disulfide) tetra-thio-phosphate(V), that reports a full occupation of the silver position and isotropic displacement parameters for the atoms, the current redetermination reveals a silver deficiency with a site-occupation factor of 0.88 (1) and reports all atoms with anisotropic displacement parameters. The structure of Ag(0.88)Nb(2)PS(10) is composed of (∞) (1)[Nb(2)PS(10)] chains, which are built up from pairs of distorted bicapped trigonal-prismatic [NbS(8)] polyhedra forming [Nb(2)S(12)] dimers and of tetra-hedral [PS(4)] groups. These chains are connected via the statistically disordered Ag(+) ions, forming double layers. Adjacent layers are stacked solely through van der Waals forces into a three-dimensional structure. Short and long Nb-Nb distances [2.880 (1) and 3.770 (2) Å, respectively] alternate along the chain and S(2) (2-) and S(2-) anionic species are observed.

No MeSH data available.