Research Article

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

Table 1

Composition of solutions 1 and 2 used to make the synthetic calcium lead apatites, S1–S10 and T1–T3.

CodeSolution 1, 100 mLSolution 2, 1000 mLMix
Na2HPO4  (mM)NaCl
(mM)
pHCa(NO3)2 (mM)Pb(NO3)2
(mM)
Ca/PbpHpH

Chloride
experiments
S1102508.442500.55005.375.69
S210252500.55005.37
S3102.59.222500.55005.37
S4100.259.142500.55005.37

Calcium
experiments
S5100.0259.2zero0.505.437.16
S6100.0259.22500.55005.37
S7100.0259.25000.510005.37
S8100.0259.27500.515005.30
S9100.0259.210000.520005.23
S10100.0259.212500.525005.20

Target
minerals
T1100.0259.29400.51880
T2100.0259.26900.513805.184.98
T3100.509.16600.513205.235.26