▎ 摘　　要

Am arrangement of the iron atoms between two graphene planes is theoretically investigated. As shown, iron atoms form a cubic lattice with a lattice parameter of 0.2815 nm. The distance between the graphene planes is equal to 0.5656 nm. As revealed, the system 'iron atoms between the graphene layers' is thermally stable at high temperatures (up to similar to 550-600 K). However, when heating the system above 600 K, one can observe the gradual failure of an iron crystal.