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Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework
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Crystal structure of Cs2[Th(NO3)6].

Patrick Woidy1, Florian Kraus1

  • 1AG Fluorchemie, Department of Chemistry, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching, Germany.

Acta Crystallographica. Section E, Structure Reports Online
|September 25, 2014
PubMed
Summary
This summary is machine-generated.

Dicaesium hexanitratothorate(IV), Cs2[Th(NO3)6], was synthesized as colorless crystals. Its crystal structure reveals a distorted icosahedral coordination for thorium and hexagonal close-packing of cesium and thorium polyhedra.

Keywords:
crystal structurehexa­nitratothoratethorium

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Area of Science:

  • Inorganic Chemistry
  • Crystallography
  • Materials Science

Background:

  • Thorium complexes with nitrate ligands are of interest for their unique structural and chemical properties.
  • Understanding the coordination chemistry of thorium is crucial for nuclear waste management and materials science.

Purpose of the Study:

  • To synthesize and characterize Dicaesium hexanitratothorate(IV), Cs2[Th(NO3)6].
  • To elucidate the crystal structure and coordination environment of thorium and cesium ions in the synthesized compound.

Main Methods:

  • Synthesis via aqueous reaction of thorium nitrate and caesium nitrate.
  • Single-crystal X-ray diffraction for structural determination.

Main Results:

  • Dicaesium hexanitratothorate(IV) was obtained as colourless crystals.
  • The thorium atom is coordinated by six chelating nitrate anions, forming a distorted icosahedral ThO12 polyhedron.
  • Cesium atoms exhibit a coordination number of 12 with a more distorted coordination polyhedron.
  • Crystal packing is based on hexagonal close-packing (hcp) of CsO12 and ThO12 units, with ThO12 occupying half the octahedral sites.

Conclusions:

  • The synthesis yielded a novel thorium coordination compound with a defined crystal structure.
  • The study provides insights into the coordination preferences of thorium and cesium in nitrate environments.
  • The observed crystal packing offers a model for dense packing arrangements in inorganic compounds.