Saponite(FeK)

Formula : K0.34Mg2FeAl0.34Si3.66O10(OH)2

Space group: 
Monoclinic - Prismatic HM symbol (2/m) Space Group: C 2/m
Dana class: 
71.3.1b.2VIII- 71 Phyllosilicate Minerals ; 71.3 Phyllosilicates Phyllosilicate Sheets of Six-Membered Rings with 2:1 clays ; 71.3.1b Smectite group (Trioctahedral Smectites)
High temperature: 
Low temperature mineral. At higher temperatures(> 500C), detachment of (OH) ions takes place.
Geological context: 
Saponite has been formed by the alteration of eruptive igneous rocks. Saponite occurs mainly associated with minerals veins, but also in amygdaloidal cavities in basalt along with celadonite.

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 28.98 25.40 21.05 17.06 13.16 10.08 7.47 5.07