Editors’ choice in volume 85, issue 9, September 2021 for the thematic issue “Phase Transitions & New Materials” is the paper entitled ”Symmetry of the Non-Atomic Interactions of N-Atomic Energy and the Atomistic Theory of High-Order Elastic Modules” by the authors Yu. M. Gufan, E. N. Klimova, and R. A. Kutuev published in Bulletin of the Russian Academy of Sciences: Physics, 2021, Volume 85, Issue 9, P. 998-1002.