Table 4.

Variation of average bond lengths of different atom pairs.

Pair	Ca-O	Si-O	P-O	P-F	Ca-F	P-Ca
Rij/Å (G1)	2.31	1.61	1.50	—	—	3.60
Rij/Å (G2)	2.31	1.61	1.52	1.01	2.31	3.60
Rij/Å (G3)	2.31	1.61	1.54	1.01	2.31	3.60
Rij/Å (G4)	2.32	1.61	1.55	1.01	2.32	3.61
Rij/Å (G5)	2.32	1.61	1.56	1.01	2.32	3.61