Phillipsite(K)

Formula : KAlSi3O8:3H2O

Family: 
Space group: 
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/m
Dana class: 
77.1.3.6b (77) Tectosilicate Zeolite group (77.1) true zeolites (77.1.3) Gismondine and related species
High temperature: 
See Laumontite
Geological context: 
low temperature alteraton of plagioclase in volcanic rocks

Dernière mise à jour le 25.01.2021

THERMODYNAMICS

Reaction properties

Phillipsite(K) + 4H+ + H2O ⇌ Al+3 + K+ + 3H4SiO4

298.15 K, 1 bar log10K: 0.04 ΔH°r:-39343 J·mol-1 (Ref.: Internal calculation)
T(°C) 0 25 60 100 150 200 250 300
log10K 0.55 0.04 -0.76 -1.54 -2.30 -2.91 -3.46 -4.04