Directly Imaging Interstitial Oxygen in Silicate Apatite

Directly Imaging Interstitial Oxygen in Silicate Apatite

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 e...

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Veröffentlicht in:Advanced energy materials 2012-03, Vol.2 (3), p.316-321
Hauptverfasser: Zhang, Yaoqing, Su, Zixue, Azad, Abul K., Zhou, Wuzong, Irvine, John T. S.
Format: Artikel
Sprache:eng
Schlagworte:
interstitial oxygen
oxide ion conductors
silicate apatite
superstructures
transmission electron microscopy
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Zusammenfassung: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.
ISSN:1614-6832
1614-6840
DOI:10.1002/aenm.201100607