Ferrotremolite

Formula : (Ca2Fe5)Si8O22(OH)2

Space group: 
See temolite
Dana class: 
See temolite
High temperature: 
"High" temperature mineral, its stability uper limit about 900C depends on aH2O,aCO2 and also Xfe.
Geological context: 
Contact metamorphism of Ca 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
970.076 282.800 -9828634 -10508023 684.084 707.90
Reaction properties

Ferrotremolite + 14H+ + 8H2O ⇌ 2Ca+2 + 5Fe+2 + 8H4SiO4

298.15 K, 1 bar log10K: 53.66 ΔH°r: -430891 J·mol-1
T(°C) 0 25 60 100 150 200 250 300
log10K 60.59 53.66 45.78 38.66 31.64 25.93 20.95 16.24