Greenalite

Formula : Fe3Si2O5(OH)4

Space group: 
Monoclinic Space Group: Unknown
Dana class: 
71.1.2b.4 (71) Phyllosilicate Sheets of Six-Membered Rings (71.1) with 1:1 layers (71.1.2b) Serpentine group (Lizardite subgroup)
High temperature: 
Literature is poor about this mineral, estimated temperature for Chamosite Greenalite Stilpnomelane Siderite Pyrite parageneses is around 300C.
Geological context: 
A primary phase in some banded iron formations related to regional metamorphisme.

Dernière mise à jour le 25.01.2021

THERMODYNAMICS

Reaction properties
T(°C) 0 25 60 100 150 200 250 300
log10K 24.47 21.77 18.57 15.65 12.78 10.49 8.53 6.67