Cordierite

Formula : Mg2Al3(AlSi5)O18

Space group: 
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: C ccm
Dana class: 
61.2.1.1 (61) Cyclosilicate Six-Membered Rings (61.2) with Al substituted rings (61.2.1)Cordierite group
High temperature: 
The stability of cordierite is limited to low pressures and by garnet field at higher pressure: stability domain range approximately between 500C to more than 700C.
Geological context: 
Magmatic, metamorphic, and pegmatitic rocks.

Dernière mise à jour le 25.01.2021

THERMODYNAMICS

T(°C) 0 25 60 100 150 200 250 300
log10K 59.59 49.43 37.32 26.04 14.71 5.39 -2.71 -10.21