From: A density functional theory study of Fe(II)/Fe(III) distribution in single layer green rust: a cluster approach
B-P
B-LYP
PBE
B3-LYP
TPSSh
PBE0
TPSS
MP2
ΔS2(GR2 × 6(− 8))
0.047
0.042
0.051
0.038
0.039
0.040
0.049