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Related Experiment Videos

Sm5Ga3.

Guo Hua Feng1, Laurence Lacroix-Orio, Monique Tillard

  • 1Laboratoire des Agrégats Moléculaires et Matériaux Inorganiques, UMR 5072 CC15, Université de Montpellier II, Sciences et Techniques du Languedoc, 2 Place Eugène Bataillon, 34095 Montpellier Cédex 5, France.

Acta Crystallographica. Section C, Crystal Structure Communications
|July 6, 2005
PubMed
Summary

Single crystals of pentasamarium trigallium (Sm5Ga3) exhibit tetragonal symmetry. This study refines the crystal structure in space group P4/ncc, differing from previous powder data analyses.

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Area of Science:

  • Solid-state chemistry
  • Crystallography
  • Materials science

Background:

  • Pentasamarium trigallium (Sm5Ga3) is an intermetallic compound.
  • Previous studies suggested a different crystal structure based on powder diffraction data.

Purpose of the Study:

  • To determine the precise crystal structure of Sm5Ga3 using single-crystal X-ray diffraction.
  • To clarify discrepancies with previously reported structural data.

Main Methods:

  • Single-crystal X-ray diffraction was employed.
  • The crystal structure was solved and refined using the P4/ncc space group.

Main Results:

  • The crystal structure of Sm5Ga3 was confirmed to be tetragonal.
  • The space group was determined to be P4/ncc, contradicting the previously proposed I4/mcm.

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  • Specific atomic positions for Samarium and Gallium atoms within the unit cell were identified.

    • Conclusions:

    • The single-crystal diffraction data definitively establishes the P4/ncc space group for Sm5Ga3.
    • This work resolves structural ambiguities and provides accurate crystallographic information for Sm5Ga3.