mintq and iso databases

[AlT]

What is the difference between the MINTEQ database and the minteq.v4 databases ?

Is one of them more recent and maybe more up to date ?

Where is the iso database from ?

[dlparkhurst]

minteq.dat is derived from an earlier version of MINTEQA2. The database for minteq was revised in version 4, which is the source of minteq.v4.dat. 


iso.dat is described in the following publications:

Thorstenson, D.C., and Parkhurst, D.L., 2002, Calculation of individual isotope equilibrium constants for implementation in geochemical models: U.S. Geological Survey Water-Resources Investigations Report 2002-4172, 129 p.

Thorstenson, D.C., and Parkhurst, D.L., 2004, Calculation of individual isotope equilibrium constants for geochemical reactions: Geochimica et Cosmochimica Acta, v. 68, no. 11, p. 2449-2465.