Chlorite(Cca-2)

Formula : (Mg2.964Fe1.927Al1.116Ca0.011)(Si2.633Al1.367)O10(OH)8

Space group: 
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Dana class: 
71.4.1.4 (71)Phyllosilicate Sheets of Six-Membered Rings (71.4)interlayered 1:1, 2:1, and octahedra (71.4.1)Chlorite group (Tri-Dioctahedral)
High temperature: 
Around 100C to 600C C according Fe,Mg, Al substitutions.
Geological context: 
Contact, hydrothermal, and regional metamorphism of mafic minerals. A product of low-grade metamorphism of Al, Mg-rich rocks.

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
617.095 211.830 -7593265 -8240140 469.190 546.95
Reaction properties

Chlorite(Cca-2) + 17.468H+ ⇌ 2.483Al+3 + 0.011Ca+2 + 1.712Fe+2 + 2.964Mg+2

298.15 K, 1 bar log10K: 61.33 ΔH°r: -612127 J·mol-1
T(°C) 0 25 60 100 150 200 250 300
log10K 71.50 61.33 49.72 39.22 28.85 20.43 13.13 6.36