Lead orthophosphates—II. Stability of cholopyromophite at 25°c |
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| Authors: | Jerome O Nriagu |
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| Institution: | Department of the Environment, Canada Centre for Inland Waters, Burlington, OntarioCanada |
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| Abstract: | The conversion of secondary lead orthophosphate PbHPO4] into chloropyromorphite Pb5(PO4)3Cl] in ca. 10?1 M NaCl solutions has been investigated at 25°C. From the composition of the supernatant solutions, the solubility product constant for Pb5(PO4)3Cl has been calculated to be 10?84.4±0.1, corresponding to of ?906.2 kcal mol?1. The solution equilibria and phase relationships in the system PbCl2-PbO-P2O8-H2O are discussed along with the geological implications. |
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