Jim Palandri
Courtesy Research Associate

Department of Earth Sciences
1272 University of Oregon
Eugene, Oregon 97403-1272

Jim might be found volunteering:
- In Ilya Bindeman's stable isotope lab
- Maintaining the Soltherm database
- Continuing with the Gastherm project
- Somewhere in Cascade or Columbia fixing something


A project started in 2022 is reconstruction of Gastherm.dat, the thermodynamic database for volcanic gas modeling programs Gasworks, Solvgas, and Volcal. These programs are analogous to Chim-xpt, Solveq-xpt, and Geocal-xpt, except the mobile phase carrying all of the chemical components is gaseous rather than aqueous. That project is complete as of October 2025. Ongoing work includes improving Chim-xpt to allow mixer fluid temperatures up to 1000�C, as for addition of volcanic gas in scrubbing calculations. Future work might include modifying Gasworks to allow pressures greater than 1 bar.


Mostly local reference info, where off-site* links may not work

Items related to Chim, Solveq, and Geocal �
 - Soltherm2023 | Solprint � The current version derived from tc-ds636 mineral and gas data, with Holland and Powell (H&P) 2011 still the most current reference
 - Soltherm2011 | Solprint � The previous version derived from tc-ds62 from H&P 2011. Adding tourmaline and basis set component #66� univalent lithium. Sweet, sweet, lithium
 - Demo input files for Solveq & Chim that work with either of the above, but with slightly different output due to different log K's
 - Gas stoichiometry data for Geocal-xpt � Gas.sto | Reactant stoichiometry data for Chim-xpt � Minox.dat
 - SolthermBRGM.XPT | SolprintBRGM.txt � *BRGM *Thermoddem data, reformatted from the ToughReact *version. For the Martians, and other low temperature peoples
 - XPT-LogK � a utility for extracting and interpolating Soltherm log K's
 - Manuals � Solveq | Chim
 - Fugacity coefficients in mixtures of H2O, CO2, and NaCl at high P and T: program FUGCO, with a worked example and are subroutines in Chim-xpt
 - Delicious water properties, and so too for the vapor phase - Steam Tables pdf, csv

Supcrt-related items for computing log K's in Soltherm �
 - Supcrt92.zip � the original distribution from Johnson et al. (1992) using Maier-Kelly heat capacity (1932), Cp = a + b T + c T-2
 - Supcrt96 � derived from Supcrt92 and adding Powell and Holland heat capacity (1985) Cp = a + b T + c T-2 + d T-0.5
     - Cprons96 | Derived from Cprons92. Converts a Supcrt92 or Supcrt96 sequential access database to direct access, for use with Supcrt96
     - SupcrtRxn | Generates Supcrt96 input reaction files with stoichiometries extracted from Soltherm
     - Soltab | Generates Soltherm-formatted records from specially formatted Supcrt96 output

Items related to the data used by Supcrt �
 - *HPx-eos & Thermocalc � for phase equilibria computations � application and data from Tim *Holland. The primary application for which the H&P 2011 compiled their data
 - The most current Supcrt92 data might be found at the *Gitlab ENKI portal, in Everett Shock's *Geopig workgroup space, file *Slop16.dat

Notes on files SPRONS and DPRONS � Sequential-, and Direct-access PROperties of Natural Substances, as per Johnson et al 1992
 - SPRONS92.DAT � The original masterpiece
 - Sprons96_HP2023.dat � With aqueous species data from *Slop16.dat, mineral and gas data from the H&P *Thermocalc web site (file tc-ds636.txt, 2023), and bonus items of alternate origin
 - Dprons96_HP2023.dat � The above file piped through Cprons96 and ready to use with Supcrt96
 - Sprons96_HP2011.dat � The previous version using data from *Slop07.dat, and earlier H&P data (file tc-ds62.txt, 2011)
 - Some background info on the H&P data

Bits & Pieces �
 - Sprons96-xpart-HP2023.dat � The most recent and still citing H&P 2011
 - Sprons96-xpart-HP2011.dat � The previous version last used for Soltherm v.66.2025.11.30
 - Sprons96-xpart-gases.dat � The gases section, expanded to 758 items for the GASTHERM project
 - Sprons96-xpart-misc.dat � Bonus mineral and gas phase data from other sources, also properly formatted for Supcrt96. Many of these are from Slop16.dat
 - Sprons92-xpart-aqs.dat � Bonus aqueous phase species data too, properly formatted for any version of Supcrt. In particular, H4SiO4,aq. from Stef�nsson 2001; rarely does so very much hinge upon so very little


Miscellaneous links:

Experimental petrology �
 - CSPV North � LabVIEW v.2012sp1/WinXP
 - CSPV South � LabVIEW v.2018/Win10-64
 - Related items


Isotope ratio mass spectrometry �
 - Info on laser fluorination and extraction of oxygen from earth materials, for d18O and d17O isotopic analysis
 - Reference and other info. Lots of photos, mostly to help putting Humpty back together in semblance of working order, again


Fluid inclusions �
 - Some photos of the setup before it was boxed up


Just for fun �
 - Geologic map [A, B, L; USGS 7.5' - Clarno, Muddy Ranch] of Muddy Ranch and vicinity, north of Currant and Muddy Creeks, Wasco, Wheeler, and Jefferson Counties, Oregon (1993). Aka Washington Family Ranch, and before that Rajneeshpuram
 - Streetcar map of Eugene, OR, 1907-1928 � Exposed track is still be seen on Moss, Columbia, and University Streets. Modified from a map published in Eugene Weekly in 2008
 - Some photographs of the I-5 Whilamut Passage Bridge replacement and related construction, near milepost OR 192
 - Related items
 

H2O Enthalpy as f(P,T)

 
� Bringing us to 55 of 82� stable elements in the Soltherm basis set. Others being metastable acetate, oxalate, succinate, malonate, CH4, H2, N2, and NH3, and radioactive UO2+ and Pm+3, and alternate redox component O2 - where redox state is defined by either paired sulfate-sulfide or H2O-O2. A legacy from the era of 16-bit operating systems, when use of sulfide for an oxidizing system, or O2 for a reducing system, might cause an array underflow � or that was claimed to be the case but will never be verified. Since water must be present and sulfate so common, basis components sulfide and O2 were hard coded to be mutually exclusive. Pick one.
� Bismuth-209 undergoes α-decay to 205Tl with a half-life of 2.01x1019 years, or, ~1.46x1009 times the 1.38*1010 or so year age of our observable universe. To not be a pedant but only in this one case, bismuth is deemed stable. So 82 rather than 81.



Drumknott!
- Vetinari