Equation for Calculation of Saturated Water Contents in Silicate Melts: New Version

On the basis of literature sources, a sample of experimental data was formed. The sample contains the results of 394 hardening experiments characterizing the saturated water content in a wide range of intensive parameters of silicate systems. An analysis of the main published types of models of water solubility in a silicate melt showed that the equation of Gordon Moore et al. best describes the experimental results.The Moore equation, converted to exponential form, is recalibrated on an extended experimental sample. As a result, new coefficients for this equation are obtained: a = 918; bAl2O3 = – 0.712; bFeO = – 0.749; bNa2O = 0.806; c = 1.087; d = -11.45. The Moore equation with new coefficients makes it possible, with an error not exceeding ±1 - ±2 relative percent, to predict the saturated water content in silicate melts in the range: melt compositions from basalts to rhyolites; pressure from atmospheric to 15 kbar; temperatures from 550 to 1300 °C.