Upon desodiation, the rhombohedral phase gradually changes back into the cubic one. It seems that desodiation causes local changes in the crystal system that only then propagate through the material until one sodium equivalent per formula unit is removed. Simultaneously, one of the paired electrons in the a 1g orbital of the high spin Fe atoms is removed. This leads to the splitting of the t 2g states being energy neutral, while the splitting of the d-states experienced in an octahedral field still stays beneficial with respect to the barycenter due to the energy gained on the low spin Fe atoms. At this point the material corresponds to the well-known cubic Prussian blue structure (NaFe[Fe(CN) 6 ]).