ATOMIC-STRUCTURE OF A CA-DOPED [001]-TILT GRAIN-BOUNDARY IN MGO

Authors
YAN Y CHISHOLM MF DUSCHER G PENNYCOOK SJ
Citation
Y. Yan et al., ATOMIC-STRUCTURE OF A CA-DOPED [001]-TILT GRAIN-BOUNDARY IN MGO, Journal of Electron Microscopy, 47(2), 1998, pp. 115-120
Citations number
20
Categorie Soggetti
Microscopy
Journal title
Journal of Electron Microscopy → ACNP
ISSN journal
00220744
Volume
47
Issue
2
Year of publication
1998
Pages
115 - 120
Database
ISI
SICI code
0022-0744(1998)47:2<115:AOAC[G>2.0.ZU;2-Q
Abstract
The atomic structure of a symmetric 24 degrees[001] tilt grain boundar y in MgO has been derived directly from high-resolution Z-contrast ima ges obtained in a scanning transmission electron microscope. The image s indicate the presence of impurities (Z>12) and vacancies at the boun dary. High spatial resolution electron energy-loss spectroscopy has be en used to determine that the segregated impurity is Ca. The specific sites occupied by Ca are obtained from the image and bond valence sum analysis.