Gismondine

Formula : Ca2Al4Si4O16:9H2O

Family: 
Zeolites
Space group: 
Monoclinic - Prismatic HM symbol (2/m) Space Group: P 21/c
Dana class: 
77.1.3.1VIII- 77 Tektosilicates Tectosilicate Zeolite group ; 77.1 Tektosilicates Tectosilicate Zeolite group true zeolites ; 77.1.3 Gismondine and related species
High temperature: 
See Laumontite
Geological context: 
Alteration product of plagioclase in lavas

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
718.552 315.070 (Ref.: 97coo/alb) Coombs, D.S., Alberti, A., Armbruster, T., Artioli, G., Colella, C., Galli, E., Grice, J.D., Liebau, F., Mandarino, J.A., Minato, H., Nickel, E.H., Passaglia, E., Peacor, D.R., Quartieri, S., Rinaldi, R., Ross, M., Sheppard, R.A., Tillmanns, E., Vealini, G., 1997. Recommended nomenclature for zeolite minerals - report of the subcommittee on zeolites of the international mineralogical association, commission on new minerals and mineral names. Canadian Mineralogist, 35, 1571-1606. -10204879 (Ref.: Internal calculation) -11179800 (Ref.: 08bla) Blanc P. (2008) : Thermoddem - Selection de proprietes thermodynamiques pour les principales especes aqueuses et minerales porteuses de fer. Rapport final. Rapport BRGM/RP-56587-FR, 70p. 742.240 (Ref.: 10vie) Vieillard P., 2010 - A predictive model for the entropies and heat capacities of zeolites. Eur. J. Mineral. 22, 823-836 869.34 (Ref.: 10vie) Vieillard P., 2010 - A predictive model for the entropies and heat capacities of zeolites. Eur. J. Mineral. 22, 823-836
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.
745.48 569.00 -40.70 (Ref.: 10vie) Vieillard P., 2010 - A predictive model for the entropies and heat capacities of zeolites. Eur. J. Mineral. 22, 823-836
Reaction properties

Gismondine + 16H+ ⇌ 4Al+3 + 2Ca+2 + 4H4SiO4 + 9H2O

298.15 K, 1 bar log10K: 39.00 ΔH°r:-467714 J·mol-1 (Ref.: 08bla) Blanc P. (2008) : Thermoddem - Selection de proprietes thermodynamiques pour les principales especes aqueuses et minerales porteuses de fer. Rapport final. Rapport BRGM/RP-56587-FR, 70p.
T(°C) 0 25 60 100 150 200 250 300
log10K 46.34 39.00 30.30 22.28 14.26 7.68 1.88 -3.62
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-4001.721868 -0.580568 247344.970433 1428.423031 -13362172.095988