Stable and metastable phases are checked using rigorous criteria based on phase stability index
Aqueous equilbria may involve many (non)ideal solid or liquid solutions, gas mixture or non-ideal gaseous fluids
Multi-site-surface complexation on mineral-water interfaces can be computed, also without site balances
Redox state is calculated from the bulk chemical composition of the system via the GEM dual solution
Processes of chemical mass transfer can be simulated using principles of local and partial equilibrium
Built-in default chemical thermodynamic database is provided; third-party databases are also available
Thermodynamic data is automatically corrected for temperature and pressure of interest
GEMS3K - the standalone kernel of GEMS3 can be coupled to mass-transport or parameter-fitting codes
Qt5- based Graphical User Interface with plotting of results and a context-sensitive run-time help system
Installers available for all major PC platforms (Windows 10; Macos 10.11 to 10.15; Ubuntu linux 18.04 LTS)
download it; install as described in TechInfo page; start the program; click on the 'Help' toolbar button; read instructions there.
If you experience a problem, please report it in an e-mail to GEMS
Development Team. Frequently
GEMS3 software package is always under development. GEMS is distributed "as is" by the Laboratory for Waste Management (LES) of the Paul Scherrer Institute (PSI) with two purposes:
Permission to use the GEM-Selektor software is hereby granted free of charge for educational and research purposes, subject to acceptance of Terms and Conditions of Use. Starting from version 3.6.0, GEM-Selektor GUI part is available open-source under the GPL v.3 license.
In any publication of your results obtained using the GEM-Selektor code,
please, cite this web page address (https://gems.web.psi.ch) and the
Kulik D.A., Wagner T., Dmytrieva S.V., Kosakowski G., Hingerl F.F., Chudnenko K.V., Berner U. (2013): GEM-Selektor geochemical modeling package: revised algorithm and GEMS3K numerical kernel for coupled simulation codes. Computational Geosciences 17, 1-24. doi.
Wagner T., Kulik D.A., Hingerl F.F., Dmytrieva S.V. (2012): GEM-Selektor geochemical modeling package: TSolMod library and data interface for multicomponent phase models. Canadian Mineralogist 50, 1173-1195. doi.
Copyright (c) 2003-2023 GEMS Development Team
Last update: 10.05.2023
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