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Pb(6)Co(9)(TeO(6))(5).

Christine Artner1, Matthias Weil

  • 1Institute for Chemical Technologies and Analytics, Division of Structural Chemistry, Vienna University of Technology, Getreidemarkt 9/164-SC, A-1060 Vienna, Austria.

Acta Crystallographica. Section E, Structure Reports Online
|September 13, 2012
PubMed
Summary
This summary is machine-generated.

Hexa-lead(II) nona-cobalt(II) penta-tellur-ate(VI) exhibits a layered crystal structure. This structure features edge-sharing and face-sharing octahedra, with stereochemically active lead atoms.

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Area of Science:

  • Inorganic Chemistry
  • Solid-State Chemistry
  • Crystallography

Background:

  • The study investigates the crystal structure of hexa-lead(II) nona-cobalt(II) penta-tellur-ate(VI), denoted as Pb(6)Co(9)(TeO(6))(5).
  • This compound is isotypic with its nickel(II) analogue, suggesting potential similarities in structural motifs and properties.

Purpose of the Study:

  • To elucidate the detailed crystal structure of Pb(6)Co(9)(TeO(6))(5).
  • To analyze the coordination environments of the metal atoms (Pb, Co, Te) and oxygen atoms.
  • To describe the layered arrangement and bonding within the crystal structure.

Main Methods:

  • Single-crystal X-ray diffraction analysis was employed to determine the crystal structure.
  • Detailed analysis of atomic positions, site symmetries, and coordination polyhedra ([CoO(6)] and [TeO(6)] octahedra).

Main Results:

  • The crystal structure is characterized by two distinct types of layers parallel to the (001) plane.
  • One layer comprises edge-sharing [CoO(6)] and [TeO(6)] octahedra with unoccupied octahedral holes.
  • The second layer consists of alternating Pb(II) atoms and face-sharing [CoO(6)]/[TeO(6)] double octahedra, linked by corner-sharing octahedra.

Conclusions:

  • The crystal structure of Pb(6)Co(9)(TeO(6))(5) is described in detail, revealing a complex layered arrangement.
  • Pb(II) atoms are located in the framework cavities and exhibit stereochemically active one-sided [4]- and [6]-coordinations.
  • The findings contribute to the understanding of layered cobalt-tellurate structures and the role of stereochemically active lone pairs in lead compounds.