Remark: All the following content pertains to the versions 7.2[a-c] of the EQ3/6 geochemical modeling software package. It is written and maintained by Thomas Wolery ( wolery1@llnl.gov ) from the Lawrence Livermore National Laboratory / LLNL.

All major changes to my EQ3/6 pages are documented in a separate file. Last Update: September 1, 2010

EQ3/6 is in wide-spread use nowadays for many geochemical modeling purposes. I have prepared a page about some traps and pitfalls, together with some further remarks. Some users will also have noticed that there is no easy way to do speciation scans on varying pH like it can be done by members of the PHREEQE or MINEQL code families, not to talk from scans over varying Eh or the concentration of some components. To overcome this limitation at least partially, I have written some tools to allow such scans by automatically starting a sequence of EQ3NR runs with appropriately updated input files, or by analyzing and drastically shortening of the huge output from an EQ6 "titration" run. These tools are essentially shell scripts, namely for the C-Shell under UNIX (but I was told that this shell is now also available under the various flavors of the PC operating system MS Windows).