Table 3. Bond-valence parameters for large alkali and alkaline-earth metals calculated with and without a hard cut-off of 12 bonds.

Ion	R o (Å)	B (Å)	RMSD (v.u.)
K+	2.047	0.398	0.164
K+ (CN ≤ 12)	1.985	0.425	0.157
Rb+	1.993	0.478	0.150
Rb+ (CN ≤ 12)	1.780	0.577	0.148
Cs+	2.305	0.411	0.138
Cs+ (CN ≤ 12)	1.966	0.561	0.138
Ba2+	2.223	0.406	0.217
Ba2+ (CN ≤ 12)	2.208	0.417	0.215