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Related Experiment Video

Updated: Jun 1, 2026

High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements
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I(8)As(21)Ge(25).

Katia Ayouz1, Mohammed Kars, Allaoua Rebbah

  • 1Laboratoire Sciences des Matériaux USTHB, Faculté de Chimie, Université Houari-Boumedienne, BP 32 El-Alia, 16111 Bab-Ezzouar, Alger, Algérie.

Acta Crystallographica. Section E, Structure Reports Online
|May 18, 2011
PubMed
Summary
This summary is machine-generated.

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Single crystals of octaiodine henacosarsenic pentacosagermanium were successfully grown. The study reveals the unique clathrate-I structure with guest iodine atoms occupying distinct polyhedral sites.

Area of Science:

  • Solid-state chemistry
  • Inorganic crystal structure determination
  • Materials science

Background:

  • Clathrate compounds are inclusion compounds with cage-like structures.
  • Understanding guest-host interactions is crucial for materials properties.
  • Arsenic and germanium clathrates offer tunable electronic and thermal properties.

Purpose of the Study:

  • To synthesize and characterize single crystals of a novel octaiodine henacosarsenic pentacosagermanium compound.
  • To elucidate the crystal structure and atomic arrangement within this clathrate.
  • To investigate the site symmetry and location of guest iodine atoms.

Main Methods:

  • Single crystal growth via chemical transport reactions.
  • X-ray diffraction analysis to determine crystal structure.

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Synthesis of Nine-atom Deltahedral Zintl Ions of Germanium and their Functionalization with Organic Groups
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Last Updated: Jun 1, 2026

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  • Symmetry analysis of atomic positions.

    • Main Results:

    • Single crystals of octaiodine henacosarsenic pentacosagermanium (I$_{21}$As$_{46}$Ge$_{25}$) were successfully grown.
    • The crystal structure is isotypic with clathrates-I, featuring statistically occupied (As,Ge)$_{46}$ clathrand atoms.
    • Guest iodine atoms occupy two distinct polyhedral sites: an (As,Ge)$_{20}$ dodecahedron and an (As,Ge)$_{24}$ tetrakai-decahedron, with specific site symmetries.

    Conclusions:

    • The synthesis and structural characterization confirm the formation of a new clathrate compound.
    • The arrangement of clathrand atoms defines polyhedral cages suitable for guest atom inclusion.
    • The precise location and symmetry of guest iodine atoms provide insights into potential host-guest interactions within this clathrate framework.