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Paul Scherrer Institut PSI GEM Software (GEMS) Home

Paul Scherrer Institut
5232 Villigen PSI, Schweiz/Switzerland
Tel. +41 56 310 21 11
Fax. +41 56 310 21 99

E-Mail: gems2.support@psi.ch

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Gibbs Energy Minimization Software for Geochemical Modeling

See presentation (pdf). Why GEM-Selektor and GEM Software? See an overview.

Currently, GEM Software includes three code packages and a default thermodynamic database:  

  • GEM-Selektor v.3 (GEMS3): the interactive code package for geochemical modeling

  • GEMS3K: the standalone code for solving for geochemical equilibria (with TSolMod library)

  • GEMSFITS: the generic parameter-fitting code coupled with the GEMS3K code

  • GEMS TDB: the default chemical thermodynamic database of GEM-Selektor package

GEM software is distributed "as is" in its present state of development by the Laboratory for Waste Management (LES) of the Paul Scherrer Institute (PSI) with two purposes: 

  • to promote the GEM method and software into the academic research community;
  • to gather the users feedback, vital for making the software more functional and reliable.

Permission to download and use GEM Software is hereby granted free of charge for educational and academic research purposes, subject to acceptance of Terms and Conditions of Use. In particular, in any publication of your results obtained using GEM-Selektor or GEMS3K codes, please, cite this web page URL  (https://gems.web.psi.ch) and 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.

GEM Software is always under development (as indicated in the Newsticker). According to Google Scholar, it has been cited in more than 1500 publications. 

Copyright (c) 2003-2023 GEMS Development Team