Merlinoite(K)

Formula : K1.04Al1.04Si1.96O6:1.69H2O

Family: 
Zeolites
Space group: 
Orthorhombic - Dipyramidal HM symbol (2/m 2/m 2/m) Space Group: I mmm
Dana class: 
77.1.3.11VIII- 77 Tektosilicates Tectosilicate Zeolite group ; 77.1 Tektosilicates Tectosilicate Zeolite group true zeolites ; 77.1.3 Gismondine and related species
High temperature: 
The structure of zeolite are very responsive in temperature and/or water-vapor pressure. Some "robust" zeolites can be heated to high temperatures and can be completely dehydrated while maintaining their original structure.
Geological context: 
Zeolite occurs in a wide range of environments as macroscopic and microscopic crystals. Sedimentary-metamorphic- hydrothermally altered rocks, hydrologic systems, soil environments, gas reservoirs. Occur also as alteration product of cementious materials.

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
250.213 112.780 (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. -3277391 (Ref.: Internal calculation) -3537600 (Ref.: 09bla) Blanc P. (2009) - Thermochimie - Selection de constantes thermodynamiques pour les zeolites : version 2. Rapport final. Rapport BRGM/RP-57796-FR. 55 p. 270.480 (Ref.: 09bla) Blanc P. (2009) - Thermochimie - Selection de constantes thermodynamiques pour les zeolites : version 2. Rapport final. Rapport BRGM/RP-57796-FR. 55 p. 249.65 (Ref.: 09bla) Blanc P. (2009) - Thermochimie - Selection de constantes thermodynamiques pour les zeolites : version 2. Rapport final. Rapport BRGM/RP-57796-FR. 55 p.
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.
249.65 0.00 0.00 (Ref.: 09bla) Blanc P. (2009) - Thermochimie - Selection de constantes thermodynamiques pour les zeolites : version 2. Rapport final. Rapport BRGM/RP-57796-FR. 55 p.
Reaction properties

Merlinoite(K) + 4.16H+ + 0.15H2O ⇌ 1.04Al+3 + 1.04K+ + 1.96H4SiO4

298.15 K, 1 bar log10K: 9.48 ΔH°r:-101054 J·mol-1 (Ref.: 09bla) Blanc P. (2009) - Thermochimie - Selection de constantes thermodynamiques pour les zeolites : version 2. Rapport final. Rapport BRGM/RP-57796-FR. 55 p.
T(°C) 0 25 60 100 150 200 250 300
log10K 11.02 9.48 7.57 5.79 4.02 2.59 1.36 0.19
log10K(T) = A + B·T + C·T-1 + D·log10(T) + E·T−2 (T in Kelvin)
A B C D E
-1257.711819 -0.168476 79784.580152 445.820388 -4740260.028143