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Journal of Electronic Materials

, Volume 39, Issue 9, pp 1634–1639 | Cite as

Ba-Cu-Si Clathrates: Phase Equilibria and Crystal Chemistry

  • X. Yan
  • G. Giester
  • E. Bauer
  • P. Rogl
  • S. PaschenEmail author
Article

The formation and crystal chemistry of ternary clathrates in the Ba-Cu-Si system were investigated on a series of compounds Ba8Cu x Si46−x (3 ≤ x ≤ 8). The phase diagram around the clathrate phase was constructed at 800°C, revealing a homogeneity range from Ba8Cu3.4Si42.6 to Ba8Cu4.8Si41.2. Structural investigations confirmed that the clathrates in this system crystallize with cubic primitive symmetry, in the type I clathrate structure (space group Pm \( \bar{3} \) n). Single-crystal x-ray diffraction indicates that the Cu atoms partially substitute for Si atoms on the 6d site; no vacancies are observed.

Keywords

Clathrate phase equilibria crystal chemistry 

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Notes

Acknowledgements

We thank M. Waas for assistance in the SEM/EDX investigation, and A. Prokofiev, A. Grytsiv, and S. Laumann for assistance with several experiments and fruitful discussions. This work was supported by FFG Project THECLA (815648).

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Copyright information

© TMS 2010

Authors and Affiliations

  • X. Yan
    • 1
    • 2
  • G. Giester
    • 3
  • E. Bauer
    • 1
  • P. Rogl
    • 2
  • S. Paschen
    • 1
    Email author
  1. 1.Institute of Solid State PhysicsVienna University of TechnologyViennaAustria
  2. 2.Institute of Physical ChemistryUniversity of ViennaViennaAustria
  3. 3.Institute of Mineralogy and CrystallographyUniversity of ViennaViennaAustria

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