Addendum to: "Atomistic investigation of clustering phenomenon in the Al–Cu system: Three-dimensional phase-field crystal simulation and HRTEM/HRSTEM characterization" [Acta Mater. 61 (2013) 6372–6386]. (15th January 2015) - Fallah, Vahid; Korinek, Andreas; Ofori-Opoku, Nana; Provatas, Nikolas; Esmaeili, Shahrzad