Natrolite

Formula : Na2(Al2Si3)O10:2H2O

Family: 
Zeolites
Space group: 
Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: F dd2
Dana class: 
77.1.5.1 (77) Tectosilicate Zeolite group (77.1) true zeolites (77.1.5) Natrolite and related species
High temperature: 
See Laumontite
Geological context: 
See Laumontite

Dernière mise à jour le 25.01.2021

THERMODYNAMICS

Individual properties (298.15 K)
M
g·mol-1
 V°
cm3·mol-1
 ΔGºf
J·mol-1
 ΔHºf
J·mol-1
 Sº
J·mol-1·k-1
 CP
J·mol-1·K-1
380.224 169.200 (Ref.: 95rob/hem) Robie R.A., and Hemingway B.S., 1995. Thermodynamic properties of minerals and related substances at 298.15 K and 1 Bar (105 Pascals) pressure and at higher temperatures. U.S. Geol. Survey Bull., 2131, 461 pp. -5316643 (Ref.: Internal calculation) -5718600 (Ref.: 83joh/flo) Johnson G. K., Flotow H. E., and O'Hare P. A. G. (1983) Thermodynamic studies of zeolites:natrolite mesolite and scolecite. American Mineralogist 68, 1137-1145 359.730 (Ref.: 83joh/flo) Johnson G. K., Flotow H. E., and O'Hare P. A. G. (1983) Thermodynamic studies of zeolites:natrolite mesolite and scolecite. American Mineralogist 68, 1137-1145 359.23 (Ref.: 83joh/flo) Johnson G. K., Flotow H. E., and O'Hare P. A. G. (1983) Thermodynamic studies of zeolites:natrolite mesolite and scolecite. American Mineralogist 68, 1137-1145
CP(T) = a + b·T + ·c·T-2 (T in Kelvin)
a
J·mol-1·K-1
 b * 103
J·mol-1·K-2
 c * 10-5
J·K·mol-1
 Maier Kelley Ref.
301.96 376.88 -48.98 (Ref.: 83joh/flo) Johnson G. K., Flotow H. E., and O'Hare P. A. G. (1983) Thermodynamic studies of zeolites:natrolite mesolite and scolecite. American Mineralogist 68, 1137-1145
Reaction properties

Natrolite + 8H+ ⇌ 2Al+3 + 2Na+ + 3H4SiO4

298.15 K, 1 bar log10K: 19.33 ΔH°r:-215463 J·mol-1 (Ref.: 83joh/flo) Johnson G. K., Flotow H. E., and O'Hare P. A. G. (1983) Thermodynamic studies of zeolites:natrolite mesolite and scolecite. American Mineralogist 68, 1137-1145
T(°C) 0 25 60 100 150 200 250 300
log10K 22.67 19.33 15.30 11.59 7.92 4.94 2.34 -0.12
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-2303.612045 -0.319935 143524.821796 819.802352 -8143121.087057