Progress in Earth and Planetary Science

Table 1 Mineral compositions and entropies at 642 °C (used in this paper)

From: Diffusion-controlled growth and degree of disequilibrium of garnet porphyroblasts: is diffusion-controlled growth of porphyroblasts common?

Mineral	Formula	S (J/mole K)
Garnet (Grt)	Fe_2.7 Mg_0.3Al₂Si₃O₁₂	831
Biotite (Bt)	KFe_1.8 Mg_1.2AlS_i3O₁₀(OH)₂	913
Sillimanite (Sil)	Al₂SiO₅	279
Quartz (Qtz)	SiO₂	106
K-feldspar (Kfs)	KAlSi₃O₈	509
Cordierite (Crd)	FeMgAl₄Si₅O₁₈•(H₂O)_0.5	1192
Water (W)	H₂O	229
Reaction	4Bt + 10Sil + 15.5Qtz = Grt + 4Kfs + 4.5Crd + 1.75 W	542

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