Margarite

Formula : CaAl2(Al2Si2)O10(OH)2

Space group: 
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c
Dana class: 
71.2.2c.1 (71)Phyllosilicate Sheets of Six-Membered Rings (71.2) with 2:1 Layers (71.2.2c)Mica Group (Margarite subgroup)
High temperature: 
The lower stability limit of maragrite is constrained by a pressure about 3 Kbars for a temperature below 400C, the upper limit is around 700C for 10 Kb.

Dernière mise à jour le 25.01.2021

THERMODYNAMICS

T(°C) 0 25 60 100 150 200 250 300
log10K 45.12 37.00 27.45 18.58 9.61 2.16 -4.40 -10.53