Figure 4
From: Superconductivity at 44 K in K intercalated FeSe system with excess Fe
Possible atomic positions of excess Fe(2) atoms (green balls) in equilibrium structures with I4/mmm group symmetry preserved.
The excess Fe(2) atoms are in the (a) 2a, (b) 2b, (c) 4c and (d) 4e, Wyckoff positions, respectively.
