Department of Earth Science |Northeastern Illinois University

 ESCI 406: Aqueous Geochemistry
Instructor: Laura L. Sanders, Ph.D.
Spring 2002

Geochemical Software and Other Downloads

A thermodynamics calculator at this site allows you to calculate change in enthalpy and free energy for many different reactions.  The site is comprehensive and includes good sections on thermodynamics, equilibrium, and other areas of chemistry.

PHREEQCI: PHREEQCI is a program for speciation, batch-reaction, one-dimensional transport, and inverse geochemical calculations.  At this page, click on "PhreeqcI Version 2.6.0.1 (May 31, 2002) (10.9M)" to download.  Keep track of where you save it to, so that you can find it again.  Beware: it can take a long time to download if you have a slow connection!  When you are done downloading, find the folder you saved it to, and then click on the icon to install it.

WATEQ4F: A program for calculating speciation of major, trace, and redox elements in natural waters

USGS Water Supply Paper 2254: Study and Interpretation of the Chemical Characteristics of Natural Water, by John D. Hem. Available as a .pdf file.

GW_Chart:  Software from the USGS for creating Piper trilinear diagrams and several other kinds of charts.

© 2002 Laura L. Sanders.  Last updated November 27, 2002.