Fig. 1: Structural illustration of water insertion.
From: The stability of P2-layered sodium transition metal oxides in ambient atmospheres

Schematic illustration of P2-Na0.67MnO2, birnessite, and buserite phases.
From: The stability of P2-layered sodium transition metal oxides in ambient atmospheres
Schematic illustration of P2-Na0.67MnO2, birnessite, and buserite phases.