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Directly Imaging Interstitial Oxygen in Silicate Apatite
Author(s) -
Zhang Yaoqing,
Su Zixue,
Azad Abul K.,
Zhou Wuzong,
Irvine John T. S.
Publication year - 2012
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201100607
Subject(s) - apatite , silicate , oxygen , materials science , oxygen atom , mineralogy , chemical engineering , chemistry , molecule , organic chemistry , engineering
Oxygen interstitial defects in silicate apatite have been imaged directly using high‐resolution transmission electron microscopy. The accommodation of interstitial oxygen anions in the host lattice network gives rise to larger defective areas than a single oxygen atom, which enables imaging of the extended defect. A new model is proposed to account for excess oxygen and its solubility in apatite that is consistent with neutron diffraction data.