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
Qt4 (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 XP, 7, 8; Mac OS X 10.6 and up; ubuntu linux 10.4 and up)
download it; install as described in TechInfo page; start the program; click on the 'Help' toolbar button; read instructions there.
experience a problem, please report it in an e-mail to GEMS Development Team.
Frequently asked questions.
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:
use the GEM-Selektor software is hereby granted free
of charge for educational
and research purposes, subject to acceptance of Terms
and Conditions of
particular, in any publication of your results obtained using the
GEM-Selektor code, please, cite this web page address
the following papers:
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) 2003-2015 GEMS Development Team
Last update: 19.04.2015