Muscovite(disordered)

Formula : KAl2(AlSi3)O10(OH)2

Space group: 
Monoclinic - Prismatic HM symbol (2/m) Space Group: C 2/m
Dana class: 
71.2.2a.1VIII- 71 Phyllosilicate Minerals ; 71.2 Phyllosilicates Phyllosilicate Sheets of Six-Membered Rings with 2:1 Layers ; 71.2.2a Mica Group (Muscovite subgroup)
High temperature: 
The stability domain of muscovite can be established bewteen around 350 - 400C to around 600-700C in the presence of quartz.
Geological context: 
A common rock-forming mineral, in phyllites, schists, and gneisses; in granites, granite pegmatites, and aplites. Formed from other minerals under hydrothermal conditions; may be detrital or authigenic.

Dernière mise à jour le 25.01.2021

THERMODYNAMICS

Individual properties (298.15 K)
T(°C) 0 25 60 100 150 200 250 300
log10K 18.18 14.02 8.95 4.19 -0.66 -4.74 -8.39 -11.91