Direct observation of incommensurate structure in Mo3Si

Ahmet Gulec, Xiaoxiang Yu, Matthew Taylor, John H. Perepezko, Laurence Marks*

*Corresponding author for this work

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Z-contrast imaging, electron diffraction, atom-probe tomography (APT) and density functional theory calculations were used to study the crystal structure of the Mo3Si phase which was previously reported to have an A15 crystal structure. The results showed that Mo3Si has an incommensurate crystal structure with a non-cubic unit cell. The small off-stoichiometry in composition of the sample which was revealed by APT and atomic resolution Z-contrast imaging suggested that site substitution caused the development of split atomic positions, disorder and vacancies.Mo3Si with a small off-stoichiometry in composition has an incommensurate crystal structure with a non-cubic unit cell. Atom-probe tomography and atomic resolution Z-contrast imaging suggest that site substitution causes the development of split atomic positions, disorder and vacancies.

Original languageEnglish (US)
Pages (from-to)660-666
Number of pages7
JournalActa Crystallographica Section A: Foundations and Advances
Volume72
Issue number6
DOIs
StatePublished - Nov 1 2016

Keywords

  • MoSi
  • atom-probe tomography
  • electron diffraction
  • incommensurate structure
  • transmission electron microscopy

ASJC Scopus subject areas

  • Structural Biology
  • Biochemistry
  • Materials Science(all)
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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