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CHNOSZ  

Thermodynamic Calculations and Diagrams for Geochemistry
View on CRAN: Click here


Download and install CHNOSZ package within the R console
Install from CRAN:
install.packages("CHNOSZ")

Install from Github:
library("remotes")
install_github("cran/CHNOSZ")

Install by package version:
library("remotes")
install_version("CHNOSZ", "2.2.0")



Attach the package and use:
library("CHNOSZ")
Maintained by
Jeffrey Dick
[Scholar Profile | Author Map]
All associated links for this package
First Published: 2009-04-23
Latest Update: 2025-06-20
Description:
An integrated set of tools for thermodynamic calculations in aqueous geochemistry and geobiochemistry. Functions are provided for writing balanced reactions to form species from user-selected basis species and for calculating the standard molal properties of species and reactions, including the standard Gibbs energy and equilibrium constant. Calculations of the non-equilibrium chemical affinity and equilibrium chemical activity of species can be portrayed on diagrams as a function of temperature, pressure, or activity of basis species; in two dimensions, this gives a maximum affinity or predominance diagram. The diagrams have formatted chemical formulas and axis labels, and water stability limits can be added to Eh-pH, oxygen fugacity- temperature, and other diagrams with a redox variable. The package has been developed to handle common calculations in aqueous geochemistry, such as solubility due to complexation of metal ions, mineral buffers of redox or pH, and changing the basis species across a diagram ("mosaic diagrams"). CHNOSZ also implements a group additivity algorithm for the standard thermodynamic properties of proteins.
How to cite:
Jeffrey Dick (2009). CHNOSZ: Thermodynamic Calculations and Diagrams for Geochemistry. R package version 2.2.0, https://cran.r-project.org/web/packages/CHNOSZ. Accessed 04 Jun. 2026.
Previous versions and publish date:
0.8 (2009-04-23 09:11), 0.9-1 (2010-07-24 21:40), 0.9-2 (2010-08-26 08:42), 0.9-3 (2010-12-22 09:57), 0.9-4 (2011-02-23 10:33), 0.9-5 (2011-04-05 16:46), 0.9-6 (2011-08-18 07:32), 0.9-7 (2011-08-23 07:10), 0.9-9 (2013-01-01 15:15), 0.9 (2009-11-30 21:26), 1.0.0 (2013-03-28 17:38), 1.0.1 (2013-07-04 18:54), 1.0.3.1 (2014-02-12 09:24), 1.0.3 (2014-01-12 16:51), 1.0.5 (2015-05-20 01:11), 1.0.6 (2015-10-19 23:23), 1.0.7 (2015-11-20 00:41), 1.0.8 (2016-05-28 20:30), 1.1.0 (2017-05-04 19:48), 1.1.3 (2017-11-13 01:07), 1.2.0 (2019-02-10 06:23), 1.3.0 (2019-02-26 00:50), 1.3.1 (2019-03-03 21:30), 1.3.2 (2019-04-21 17:10), 1.3.3 (2019-08-03 00:40), 1.3.4 (2019-12-15 17:10), 1.3.5 (2020-02-17 17:40), 1.3.6 (2020-03-16 18:30), 1.4.0 (2020-11-11 14:50), 1.4.1 (2021-04-09 07:00), 1.4.2 (2022-02-08 16:30), 1.4.3 (2022-02-22 04:20), 2.0.0 (2023-03-13 18:10), 2.1.0 (2024-02-11 14:40)
Other packages that cited CHNOSZ R package
View CHNOSZ citation profile
Other R packages that CHNOSZ depends, imports, suggests or enhances
Complete documentation for CHNOSZ
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