Table 7. Cumulative Electron Populations of Atomic Basins in Diamond and Boron Nitride (Zincblende) from Successive Inclusion of Delocalization Shells α with DI δ_α^a.

α	coordination sphere	δα	⟨NelA⟩cum
0	C	–	3.820
1	C–C(1)	0.914	5.648
2	C–C(2)	0.044	5.912
0	B	–	2.075
1	B–N(1)	0.357	2.789
2	B–B(2)	0.002	2.801
0	N	–	7.517
1	N–B(1)	0.357	8.231
2	N–N(2)	0.155	9.161

^aThe sum rule of eq 34 approaches ⟨N_el^A⟩=6 as delocalization with more distant atoms is included. Boron has ⟨N_el⟩ = 2.839 electrons, and nitrogen has ⟨N_el^A⟩ = 9.161 electrons.