Skip to main content

Advertisement

Table 3 Pit Nucleation Model. Fitted parameters for equations 20 and 21 needed to describe diopside dissolution as a function of temperature.

From: Effect of solution saturation state and temperature on diopside dissolution

ΔHα-homogeneous = 749,700 mJ m-2
ΔHα-defect assisted = -91,644 mJ m-2
Eb-homogeneous = 2.59 × 10-16 mJ K-1, ln bhomogeneous = -11.57 mol cm-2 s-1
Eb-defect assisted = 8.44 × 10-16 mJ K-1, ln bdefect assisted = 83.34 mol cm-2 s-1
ω = 1.1 × 10-28 m3, h = 5.25 × 10-10 m
T°C 1 K eq α homogenous mJ m-2 2 y-intercept homogeneous α defect assited mJ m-2 2 y-intercept defect-assisted
125 1014.48 275.9 -25.5 39.4 -36.9
150 1013.27 164.6 -25.5 53.0 -30.6
160 1012.82 123.7 -25.5 58 -28.3
175 1012.19 365.8 3-25.5 365.1 3-25.0
  1. 1Solubility constants Keq are taken from Supcrit92 (Johnson et al., 1992).
  2. 2Calculated from: y-interceptT,i = ln KT,eq + ln bi - Eb T,i/kT
  3. 3Values for 175°C were extrapolated based on temperature dependence of best fit values at 125, 150, and 160°C.