Electron microscopy
  
(HAADF) STEM Images of Manganese (Mn)
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Figure 1247 shows the structure of spinel Li[Mn2]O4 along the cubic [110] axis. Figure 1247 (b) is an HAADF STEM image, where only the Mn atoms of the diamond periphery are visible, while the Li and O atoms are invisible.

spinel Li[Mn2]O4
Li[Mn2]O4)
(a) (b)
Figure 1247. (a) Atomic structural model of LMO (spinel Li[Mn2]O4) viewed along the cubic [110] axis. Li atoms (green) occupy tetrahedral sites, and Mn atoms (purple) occupy octahedral sites within a face-centered-cubic array of oxygen atoms (red). (b) Corresponding HAADF STEM image in which bright spots correspond to columns of Mn. Among these, the brighter spots are associated with Mn columns containing a higher number of atoms. [1]

 

 

[1] Charles D. Amos, Manuel A. Roldan, Maria Varela, John B. Goodenough, and Paulo J. Ferreira, Revealing the Reconstructed Surface of Li[Mn2]O4, Nano Lett. 2016, 16, 2899−2906.

 

 
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