I looked in phreeqc.dat, wateq4f.dat, llnl.dat, and minteq.dat, and none
have analytical expressions for vivianite, nor can I find any instance of
the number 234.205 in any of the databases. So I'm confused as to where to
locate the error; it looks like it is not in any of the databases that I
distribute.
David
David Parkhurst (dlpark@xxxxxxxx)
U.S. Geological Survey
Box 25046, MS 413
Denver Federal Center
Denver, CO 80225
Project web page: https://wwwbrr.cr.usgs.gov/projects/GWC_coupled
Jasper Griffioen
<j.griffioen@xxx To: David L Parkhurst <dlpark@xxxxxxxx>, Tony Appelo <appt@xxxxxxxxx>
g.tno.nl> cc:
In-Reply-To: <3D33DB4C.F418064B@xxxxxxxxxxx>
Subject: phreeqc-database
07/16/02 02:37
AM
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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