. 2016 Feb 3;6:20288. doi: 10.1038/srep20288

Table 1. Correlation between the degree of distortion and the oxygen vacancy concentrations in each model GB.

GB type	Structural distortion [nm⁻²]		Oxygen vacancy densities
GB type	Stoichiometric	Nonstoichiometric	Oxygen vacancy densities
Σ3[110]/{111}	8.5^a	—	0
Σ9[110]/{221}	13.8	—	0
Σ11[110]/{332}	14.8	11.1	1.5
Σ13[001]/{510}	16.1	9.4	2.7
Σ5[001]/{210}	17.8^a	13.9^b	3.0^b

The density of oxygen coordination deficient sites projected to each GB plane was calculated as a measure of structural distortion for both the stoichiometric GB and nonstoichiometric GB, while the density of oxygen vacancy projected to each GB plane obtained from EELS was shown as a measure of oxygen vacancy concentrations.

^adata from ref. 20.

^bdata from ref. 19.