Table 2.

Average Mn-O bond lengths and Mn-O-Mn angles as a function of oxygen stoichiometry, as well as R and Δ.

	ABO2.5	ABO2.67	ABO2.75	ABO3
Mnoct - Ooct-IP [Å]	1.958	1.955	1.962	1.962
Mnoct - Ooct-OP [Å]	N/A	1.998	1.985	1.957
Mnoct - Oint [Å]	2.247	2.159	2.191	N/A
Mntet - Otet [Å]	2.073	2.069	2.065	N/A
Mntet - Oint [Å]	1.989	2.000	1.996	N/A
∠ Mntet - Oint - Mnoct [°]	153.13	157.18	154.95	N/A
R [Å]	4.899	4.923	4.909	N/A
Δ [×104]	50.639	15.231	13.820	0.9622

The subscripts are defined in Fig. 1.