Figure 1
From: Half-Metallic Behavior in Doped Sr2CrOsO6 Double Perovskite with High Transition Temperature

Top row, left panel: The cubic structure of Sr2CrOsO6 in Fm-3m space group.
The large shaded-brown, medium green, medium blue and small red balls represent Sr, Cr, Os and O atoms respectively. Top row, right panel: The A sublattice with one out of eight Sr atoms substituted by Na/La. The substituted atom is shown as yellow ball. Middle row: The A sublattice with two out of eight Sr atoms substituted by Na/La, in various inequivalent positions. Bottom row: The A sublattice with three out of eight Sr atoms substituted by Na/La, in various inequivalent positions.