The Identification and Synthesis of Lead Apatite Minerals Formed in Lead Water Pipes

Table 3

Possible formulae of target mineral T1 together with general formulae. Divalent cation vacancies are denoted by the symbol □. Formulae containing carbonate are more complex and are not shown.

Possible formulae of the charge balanced target mineral T1	General formula
Pb3.4Ca1.3□0.3(PO4)2.4(HPO4)0.6OH0.03Cl0.95	PbCay□(PO4)(HPO4)OHwCl
Pb3.4Ca1.3Na0.3(PO4)2.7(HPO4)0.3OH0.03Cl0.95	PbCaNa(PO4)(HPO4)OHCl
Pb3.4Ca1.3□0.6(PO4)3(H2O)0.6OH0.4	PbCa□(PO4)3(H2O)OH
Pb3.4Ca1.3Na0.3(PO4)3(H2O)0.3OH0.7	PbCaNa(PO4)3(H2O)OH
Any combination of the above formulae