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Figure 9
HAADF-STEM micrographs. The bright contrast is sensitive to the high atomic number and indicates qualitatively the presence of more lead in the central zone than in the outer. This result is quantitatively corroborated by the radial distribution of lead and oxygen along the dotted line (b) recorded by energy dispersive spectroscopy (TEM–EDS) on a lead dioxide particle: the PbO monoxide is located around the centre while the PbO2 dioxide is homogeneously distributed in the surrounding area. However, there are cracks around the PbO central zone at the PbO/PbO2 interface (a).

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 52| Part 2| April 2019| Pages 304-311
https://doi.org/10.1107/S1600576719001079
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