Dear David and Tony, Herewith I would like to ask your attention for a small mistake in the PHREEQC database (and maybe other databases as well). The values for the analytic expression for the solubility of vivianite should read: +234.205 0.0 -12,242.6 -92.510 instead of -234.205 0.0 +12,242.6 +92.510 The reason is presumably that Al-Borno & Tomson (GCA(58/24), 5373-5378) report the analytic expression for pK instead of logK. Best regards, Jasper Griffioen
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