Dickite

Formula : Al2Si2O5(OH)4

Space group: 
Monoclinic - Domatic H-M Symbol (m) Space Group: Cc
Dana class: 
71.1.1.1 (71) Phyllosilicate Sheets of Six-Membered Rings (71.1) with 1:1 layers (71.1.1) Kaolinite group
High temperature: 
Hydrothermal systems 110 to 270C.
Geological context: 
Kandite (kaolinite)group mineral.

Dernière mise à jour le 11.06.2018

THERMODYNAMICS

Individual properties (298.15 K)
M
g·mol-1
cm3·mol-1
ΔGºf
J·mol-1
ΔHºf
J·mol-1
J·mol-1·k-1
CP
J·mol-1·K-1
258.160 99.300 -3777302 -4099800 197.100 239.56
Reaction properties

Dickite + 6H+ ⇌ 2Al+3 + 2H4SiO4 + H2O

298.15 K, 1 bar log10K: 9.39 ΔH°r: -185218 J·mol-1
T(°C) 0 25 60 100 150 200 250 300
log10K 12.35 9.39 5.98 2.86 -0.27 -2.88 -5.22 -7.45