Experimental analysis reveals solubility levels of NaF, indicating refined thermodynamic properties for fluorine in hydrothermal fluids.
The solubility of NaF (villiaumite) in water was experimentally determined for the first time in a wide range of temperatures T = 5–443°C and pressures P = 1–1000 bar. At high TP-parameters, the solubility was 1.5–4 times lower than the values predicted by the SUPCRT97 thermodynamic database. Within the HKF model, the thermodynamic properties of NaF were estimated and the HKF parameters of the basic ion F⁻, necessary for describing its properties in the region of elevated (>100°C) temperatures, were significantly refined. The obtained experimental data allow to estimate the maximum possible level of fluorine concentration in hydrothermal alkaline fluids, which is determined by the solubility of NaF.
No takes yet. Share an insight, caveat, or question.
M.E. Tarnopolskaia (2025) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: