Correction for 'Planar vs. three-dimensional X62-, X2Y42-, and X3Y32- (X, Y = B, Al, Ga) metal clusters: an analysis of their relative energies through the turn-upside-down approach by Ouissam El Bakouri et al., Phys. Chem. Chem. Phys., 2016, 18, 21102-21110.