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Author Topic: Question regarding missing RATES info for Ca2SiO4 in PHREEQC  (Read 2088 times)

miriam.absalyamova

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Question regarding missing RATES info for Ca2SiO4 in PHREEQC
« on: 08/07/21 08:48 »
Dear All,

I am currently doing kinetics simulations that require RATES datablock for Calcium Silicate, Ca2SiO4, also known as calcium orthosilicate / calsil / larnite. I have searched in all the databases that I was able to find (including carbfix.dat, geothermal.dat, and diagenesis.dat), but there is no RATES info for this mineral. If you have an idea of where to find the missing info, I would highly appreciate it! If not, why there is no information on this quite common mineral?
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dlparkhurst

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Re: Question regarding missing RATES info for Ca2SiO4 in PHREEQC
« Reply #1 on: 08/07/21 15:13 »
Most of the rate compilations for PHREEQC are for common naturally-occurring minerals based on Palandri and Kharaka (2004) and Sverdrup et al. (2019). Here is a version based primarily on Palandri and Kharaka: https://hydrogeochem.earth.indiana.edu/software/index.html

My guess is that Ca2SiO4 is most important in consideration of concrete processes, possibly as C2S or belite. In any case, I think you will have to look into the literature to see if you can find any relevant papers.
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