Olivine

Thermodynamic Properties of Olivine Solid Solutions with general formula (Ca,Mg,Fe2+)[M2](Mg,Fe2+)[M1]SiO4

  1. Calculate Wt % oxides from mole fractions of endmembers.
  2. Calculate mole fractions of endmembers from Wt % oxides.
  3. Calculate thermodynamic properties from mole fractions of endmembers, T and P.
SiO2 FeO MgO CaO
Wt % oxides:
Fayalite
Fe2SiO4		 Forsterite
Mg2SiO4		 Monticellite
CaMgSiO4
Mole Fraction:

Calculation of Thermodynamic Properties require specification of temperature (T) and Pressure (P)

Input a temperature (C): .
Input a pressure (bars): .
Action: results or the form.

Sack RO, Ghiorso MS (1989) Importance of considerations of mixing properties in establishing an internally consistent thermodynamic database: thermochemistry of minerals in the system Mg2SiO4-Fe2SiO4-SiO2. Contributions to Mineralogy and Petrology 102, 41-68

Hirschmann MM (1991) Thermodynamics of multicomponent olivines and the solution properties of (Ni,Fe,Mg)2SiO4 and (Ca,Mg,Fe)2SiO4 olivines. American Mineralogist 76, 1232-1248.