Hi Eric,
Here is the solid solution model for biotite from Lucie. We checked this model with Rob Berman about two weeks ago and it works fine.
Cheers,
Pierre
!===============================================================================
!====================================== PHASE COMPONENTS FOR SOLUTION MODEL BIOTI
!=======================================model of Tajcmanova et al. 2009=======
!----------------------------checked vs Perplex coding Feb,2016 (SWOT 16)
**** MINERAL DATA ****
! ---- -------------------------------------------------------------------------
br MG(1)H(2)O(2) br use
ST 0.0 -924920.000 64.5000 2.4630
C3 158.40000 -0.0040760 -1052300.0 -1171.300 0.00
VHP 0.000130000 485.0 0.0000 0.00 0.00000
VH2 10.0000 4.0000 -0.000150000
! ---- -------------------------------------------------------------------------
phl K(1)MG(3)AL(1)SI(3)H(2)O(12) phl use
ST 0.0 -6219160.000 328.0000 14.9640
C3 770.30000 -0.0369390 -2328900.0 -6531.600 0.00
VHP 0.000057900 513.0 0.0000 0.00 0.00000
VH2 10.0000 4.0000 -0.000150000
! ---- -------------------------------------------------------------------------
ann K(1)FE(3)AL(1)SI(3)H(2)O(12) ann use
ST 0.0 -5151670.000 418.0000 15.4320
C3 815.70000 -0.0348610 19800.0 -7466.700 0.00
VHP 0.000057900 513.0 0.0000 0.00 0.00000
VH2 10.0000 4.0000 -0.000150000
! ------------------------------------------------------------------------------
east K(1)AL(1)MG(2)AL(2)SI(2)H(2)O(12) east use
ST 0.0 -6338170.000 318.0000 14.7380
C3 785.50000 -0.0380310 -2130300.0 -6893.700 0.00
VHP 0.000057900 513.0 0.0000 0.00 0.00000
VH2 10.0000 4.0000 -0.000150000
! ------------------------------------------------------------------------------
mnbi K(1)MN(3)AL(1)SI(3)H(2)O(12) mnbi use
ST 0.0 -5462840.000 433.0000 15.2640
C3 809.90000 -0.0592130 -1514400.0 -6998.700 0.00
VHP 0.000057900 513.0 0.0000 0.00 0.00000
VH2 10.0000 4.0000 -0.000150000
! ---- -------------------------------------------------------------------------
obi K(1)MG(2)FE(1)AL(1)SI(3)O(12)H(2) obi use
ST 0.0 -6800.000 0.0000 0.0000
COM phl[2/3]ann[1/3]
!COM above with annite, not annite2 explicitly stated by Tajcmanova et al. 2009
! ---- -------------------------------------------------------------------------
tbi K(1)MG(2)TI(1)AL(1)SI(3)O(12) tbi use
ST 0.0 84000.000 11.5000 0.0000
COM phl[1]br[-1]ru[1]
! ---- -------------------------------------------------------------------------
fbi K(1)MG(2)FE(1)AL(2)SI(2)O(12)H(2) fbi use
ST 0.0 6000.000 0.0000 0.0000
COM east[1]cor[-0.5]hem[0.5]
!--------------------------------------------------------------------------------
!--------------------------------------------------------------------------------
**** SOLUTION DATA ****
BIOTI (-SITE,MARGULES) M1(1):Mg,Fe,Al,F3,Mn - M2(2):Mg,Fe,Ti,Mn - T1(2):Si,Al - v(2):OH,O
phl Mg - Mg,Mg - Al,Si - OH,OH
ann Fe - Fe,Fe - Al,Si - OH,OH
obi Fe - Mg,Mg - Al,Si - OH,OH
east Al - Mg,Mg - Al,Al - OH,OH
tbi Mg - Mg,Ti - Al,Si - O,O
fbi F3 - Mg,Mg - Al,Al - OH,OH
mnbi Mn - Mn,Mn - Al,Si - OH,OH
*** MARGULES PARAMETER ***
phl - ann
12 12000 0 0
phl - obi
12 4000 0 0
phl - east
12 10000 0 0
ann - obi
12 8000 0 0
ann - east
12 3000 0 0
obi - east
12 7000 0 0
!
!