The GEM Software (GEMS) and related material (data and documentation), contained in or furnished in connection with the GEM-Selektor v.3 (GEMS3) program package for geochemical modelling, are made available by the Paul Scherrer Institute (PSI) to be used in the public interest and for the advancement of science.
Permission to use the GEM Software is thereby granted free of charge for educational and academic research purposes only, provided and as long as these Terms and Conditions of Use are accepted.
The user agrees to acknowledge the authors (GEMS
Development Team) and the PSI in
any publications and reports that result from the use of GEMS, or in
software products that include GEMS in whole or in part, by explicitly
citing this web page address (https://gems.web.psi.ch) and the following
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, 701-723. doi.
Although the current version of GEM-Selektor package comes with
executable files only, the GEMS3K code - numerical kernel of GEMS3 - is
released open-source under the terms of LGPL (Lesser
General Public License) v.3. In particular, any modification of the
GEMS3K source code must include a notice clearly stating its purpose,
author(s), and date; the GEMS Development Team will review the
modification and decide about putting it into the next version of the
source code tree.
Because the GEM Software and related material is free (other than
nominal materials and handling expenses) and provided "as is" in its
current state, the GEMS Development Team and the PSI have made no
warranty, expressed or implied, as to the accuracy or completeness, and
cannot take any obligation to provide the user with any updates,
revisions, new versions, support, consulting, training, or assistance of
any other kind with regard to the use, operation, and performance of
The user assumes all risks for any damages whatsoever resulting from loss of use, data, or profits arising in connection with the accessibility, use, quality, or performance of this software (see Disclaimer below).
Please note that some information accessed through this page may be preliminary in nature and presented prior to final review, quality assurance, and approval by the PSI authorities. This information is provided with the understanding that it is not guaranteed to be correct or complete. Any conclusions drawn from such information are in the sole responsibility of the user.
Any use of trade marks, product, or company names in GEMS web pages and help pages is solely for descriptive purposes.
Paul Scherrer Institut
Dr. Dmitrii Kulik
or Dr. George Dan Miron
5232 Villigen PSI
Dr. Alexander Gysi
Economic GeologistNew Mexico Bureau of Geology & Mineral Resources
Department of Earth & Environmental Sciences
801 Leroy Place
Socorro, NM 87801
Last updated: 02.06.2021
Copyright (c) 2003-2021 GEMS Development Team.