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Thallium(III) selenite, Tl2(SeO3)3.

William T A Harrison1

  • 1Department of Chemistry, University of Aberdeen, Meston Walk, Aberdeen, AB24 3UE, Scotland.

Acta Crystallographica. Section C, Crystal Structure Communications
|July 6, 2005
PubMed
Summary

The crystal structure of dithallium(III) triselenium(IV) nonaoxide was determined to be monoclinic with a unique layered arrangement. This structure features interconnected TlO6 and TlO7 polyhedra, accommodating selenium lone pairs between layers.

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Area of Science:

  • Inorganic Chemistry
  • Crystallography
  • Solid-State Chemistry

Background:

  • Understanding the structural motifs of inorganic compounds is crucial for predicting their properties.
  • Thallium and selenium oxides represent a class of materials with potential applications in various fields.
  • The specific compound dithallium(III) triselenium(IV) nonaoxide (Tl2(SeO3)3) has not been extensively studied structurally.

Purpose of the Study:

  • To elucidate the crystal structure of dithallium(III) triselenium(IV) nonaoxide.
  • To characterize the coordination environment of thallium and selenium atoms.
  • To understand the packing and bonding within the crystal lattice.

Main Methods:

  • Single-crystal X-ray diffraction was employed to determine the crystal structure.
  • The crystal system and space group were identified.
  • Atomic positions and coordination polyhedra were analyzed.

Main Results:

  • The compound crystallizes in the monoclinic system with space group P21/n.
  • The structure is characterized by TlO6 octahedra and distorted TlO7 pentagonal bipyramids.
  • These polyhedra, along with (SeO3)2- pyramids, form corrugated (001) layers.
  • Selenium lone pairs are located in the interlayer regions.

Conclusions:

  • The determined monoclinic structure of Tl2(SeO3)3 reveals a novel layered arrangement.
  • The coordination of thallium and the presence of selenium lone pairs influence the overall structure.
  • This structural information provides a foundation for further investigations into the physical and chemical properties of this compound.

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