GWB 11 Essentials

Got it, downloaded it, and made an activity diagram. Thanks for making a great product!

– Megan E. M., University of Oklahoma

The software is quite user friendly and the instruction manual straightforward.

– Hlanganani Tutu, University of the Witwatersrand

The Geochemist's Workbench® 11 Essentials edition makes quick work of some of the tasks most commonly encountered in geochemistry. With a few mouse clicks, you can balance reactions, figure equilibrium constants, and produce Eh-pH (Pourbaix) and activity diagrams. The package features a spreadsheet designed to hold and manipulate your geochemical data.


New in GWB Release 11
GWB Professional, Standard, and Essentials

New features in our latest release include:

  • Cleaner, sleeker GUI.
  • USGS and APHA electrical conductivity models.
  • Multiple Stiff, Schoeller, Radial, Bar and Pie plots on a page.
  • Configurable Stiff, Schoeller, and Radial diagrams.
  • Concentration as protonated, deprotonated species (e.g., H2S, HS-, S2-).
  • Allow duplicate names of species, minerals, and gases.
  • Set working directory once for all GWB apps.

The image at left shows Stiff diagrams created from the data in a GSS spreadsheet. Click to see how to plot multiple samples on a page and more.

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Spreadsheet for geochemists
Spreadsheet for geochemists

Program GSS is the Geochemist's spreadsheet, designed to hold and manipulate your chemical analyses. Paste in your data and you can:

  • Convert chemical units.
  • Compute mineral saturation, gas fugacity.
  • Check for charge balance and figure TDS.
  • Figure aqueous species distribution, redox state.
  • Compare replicates and check standards.
  • Produce time series, cross plots, and ternary plots.
  • Make Piper, Stiff, Durov, ion balance diagrams.

And much more. Still keeping your analyses in Excel?

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Eh-pH and activity diagrams
Eh-pH and activity diagrams

Programs Act2 and Tact produce diagrams showing areas of predominance for aqueous species, and stability ranges of minerals and gases. Set as axis variables:

  • Eh and pH, including Pourbaix diagrams.
  • Aqueous species activity.
  • Gas fugacity.

You can also make:

  • Solubility diagrams.
  • Mosaic diagrams.
  • Temperature-activity diagrams.

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Distribution of species
Distribution of species

SpecE8 calculates the distribution of mass among aqueous species. Use the program to:

  • Figure concentrations, activities, activity coefficients.
  • Calculate mineral saturation states, gas fugacities.
  • Plot Piper, Stiff, Schoeller, ion balance diagrams.
  • Apply the "Pitzer equations" for activity coefficients.
  • Model sorption, ion exchange, surface complexation.

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Reaction balancing
Reaction balancing

Program Rxn balances chemical reactions. You can:

  • Balance reactions among aqueous species, minerals, and gases.
  • Calculate equilibrium constants—log Ks.
  • Figure equilibrium equations.
  • Determine equilibrium temperatures.

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Thermo data editor
Thermo data editor

TEdit is a graphical editor for creating and modifying thermodynamic and surface reaction datasets. You can:

  • View and edit data tables, elements, species, reactions, log Ks, and virial coefficients.
  • Add, delete, sort, or copy and paste entries.
  • Rebalance reactions and recalculate log Ks.
  • Exchange the location of basis, redox, and aqueous species.

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Need more power?

Upgrade your Essentials license to GWB 11 Standard or Professional for just the difference in price.