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Table 2 Parameters for the calculation of the vapor and liquid phases

From: Behavior of magmatic components in fumarolic gases related to the 2018 phreatic eruption at Ebinokogen Ioyama volcano, Kirishima Volcanic Group, Kyushu, Japan

Term Symbol Value Unit
Temp. of MV   900 °C
Temp. of LW   15 °C
Enthalpy of MV HMV 4391 kJ/kg
Enthalpy of LW HLW 64 kJ/kg
Enthalpy of Vp ditto
At 100 ℃ HVp 2676 kJ/kg
At 160 ℃ HVp 2757 kJ/kg
Enthalpy of Lp ditto
At 100 ℃ HLp 417 kJ/kg
At 160 ℃ HLp 677 kJ/kg
δ18O of MV δMV − 8.0
δ18O of LW δLW − 8.2
δD of MV δMV − 15.0
δD of LW δLW − 53.5
Ar/H2O ratio of MV CMV 0  
Ar/H2O ratio of LW CLW 3.0 × 10–7  
18O/16O fractionation factor α a  
D/H fractionation factor α a  
Ar/H2O distribution coefficient β b  
  1. a: Horita and Wesolowski (1994), b: Fermandez–Prini et al. (2003)
  2. Enthalpy values are cited from the standard steam table (e.g., Japan Society of Mechanical Engineers 1999)
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