Binding energies of K for various combined concentrations of K and H₂O occupying the two tunnels of α-Mn₈O₁₆. [K] and [H₂O] indicate the total K⁺ and H₂O concentrations summed over the two tunnels of hollandite.

[K]	[H2O]	[BEK (eV)]
0.80	1.40	−3.621
1.05	0.65	−4.689
1.05	0.90	−4.301
1.05	1.15	−4.059
1.13	0.73	−4.443
1.13	1.07	−3.987
1.30	0.65	−4.256
1.30	0.90	−4.361
1.47	0.73	−4.049
1.55	0.65	−4.089