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AX : calculate activities of mineral endmembers from chemical analyses


AX is a program which takes mineral analyses in the form of either oxide weight percent or as cations per formula unit and calculates the activities of the mineral endmembers useful for thermodynamic computations. Errors are propagated from the probe data to the final activities. This program is designed for users wanting approximate activities to use for thermo-barometric calculations, and does not use very sophisticated models (output for each mineral phase lists the assumptions made in each calculation).

Updated Oct 2022: new AX62 for 2011 dataset and White et al (2014) a-x models. Fix for ternary feldspars and bug in biotite. The old AX is still available in the download. OSX versions are now 64bit.

Versions available:

download: Mac OSX

download: Windows

download: Linux

download: Notes(pdf)

These downloads hold executables, sample input files and documentation explaining the use of the program for Mac, Linux and Windows