Figure 11
Polymerization of a PO4 group as a function of the number of bridging oxygen atoms (Obr): (a) Obr = 0 (monomer), (b) Obr = 1 (dimer), (c) Obr = 2 (trimer), (d) Obr = 3, (e) Obr = 4. The valence-sum rule cannot be satisfied for the central P5+ ion in (e), and this unit does not exist. |