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Extremely long period-stacking structure in the Sb-Te binary system.

Kouichi Kifune1, Yoshiki Kubota, Toshiyuki Matsunaga

  • 1Department of Environmental Sciences, Osaka Women's University, Japan. kifune@center.osaka-wu.ac.jp

Acta Crystallographica. Section B, Structural Science
|September 28, 2005
PubMed
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Researchers determined the crystal structure of antimony-tellurium (Sb-Te) compounds. They found multiple intermetallic compounds with varying stacking periods and inverse relationships between stacking period and tellurium concentration.

Area of Science:

  • Materials Science
  • Solid-State Chemistry
  • Crystallography

Background:

  • The antimony-tellurium (Sb-Te) binary system is known to exhibit complex phase behavior.
  • Understanding the crystal structures of intermetallic compounds is crucial for predicting and controlling material properties.

Purpose of the Study:

  • To elucidate the crystal structure of the delta-phase in the Sb-Te binary system.
  • To characterize the diversity of intermetallic compounds within this phase and their structural relationships.

Main Methods:

  • Synchrotron powder diffraction was employed to determine the crystal structure.
  • Analysis focused on identifying structural units and stacking sequences.

Main Results:

Related Experiment Videos

  • Multiple intermetallic compounds exist in the delta-phase of the Sb-Te system.
  • These structures are based on a cubic ABC stacking arrangement with two fundamental structural units.
  • The chemical formula Sb(2n)Te3 describes these compounds, with stacking layer number 2n+3.
  • An inverse relationship was observed between stacking period and tellurium concentration.

    • Conclusions:

    • The delta-phase in the Sb-Te system is characterized by a series of intergrowth structures.
    • The composition and stacking period are intrinsically linked, offering a pathway for compositional control.