BR andterms corresponded to the electron charge density of γ-Al2O3. (a) BR and (b) terms corresponded to the total electron charge density, as given in Figure 4, indicating the position of the aluminum vacancy for γ-Al2O3. BR term is obtained from Equation 3 by setting and is obtained from Equation 3 by setting c = 0.
Yazdanmehr et al. Nanoscale Research Letters 2012 7:488 doi:10.1186/1556-276X-7-488