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La2Pb(SiS4)2.

L D Gulay¹, M Daszkiewicz, I P Ruda

¹Department of Ecology and Protection of the Environment, Volyn National University, Voli Avenue 13, 43009 Lutsk, Ukraine.

Acta Crystallographica. Section C, Crystal Structure Communications

|March 6, 2010

Summary

This summary is machine-generated.

Dilanthanum(III) lead(II) bis[tetrasulfidosilicate(IV)], La(2)Pb(SiS(4))(2), was synthesized and structurally characterized. This new sulfide material exhibits unique coordination and a promising gap for crystal engineering applications.

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Area of Science:

Solid-state chemistry
Crystallography
Materials science

Background:

The La-Pb-Si-S system is explored for novel inorganic compounds.
Sulfide materials offer unique electronic and structural properties.

Purpose of the Study:

To synthesize and characterize the crystal structure of La(2)Pb(SiS(4))(2).
To investigate the potential of this material in crystal engineering.

Main Methods:

X-ray single-crystal diffraction was used for structural characterization.
Synthesis was performed from the La-Pb-Si-S system.

Main Results:

The crystal structure of La(2)Pb(SiS(4))(2) was determined.
La and Pb atoms exhibit bicapped trigonal prismatic coordination by sulfur.
Si atoms are tetrahedrally coordinated by sulfur.
An occupational disorder between La and Pb centers was identified.
Coordination polyhedra share edges, forming a unique network.
A significant gap (2.629 Å) was observed around the coordination polyhedra.

Conclusions:

La(2)Pb(SiS(4))(2) possesses a novel crystal structure with potential for crystal engineering.
The observed structural features, including the gap, suggest applications in advanced materials design.