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Al2Si2O5 4, kaolinite

Kaolinite, Al2Si2O5(OH)4 or Al2O3-2SiO2-2H2O , is a sheet silicate with Al atoms in octahedral and Si atoms in tetrahedral coordination the corresponding electrostatic bond strengths are ... [Pg.59]

Many mineralogic reactions involve exchange of cations or anions. Hence, geochemists commonly need to determine equilibrium lines in terms of activity ratios. Consider, for example, the reaction at 25°C between the clay kaolinite [Al2Si2O5(OH)4] and the mica muscovite. The RXN commands... [Pg.149]

Repeating the calculations using minerals such as kaolinite [Al2Si2O5(OH)4] or muscovite [KAl3Si3Oi0(OH)2] to fix pH also produces nonunique results. [Pg.157]

We further specify equilibrium with kaolinite [Al2Si2O5(OH)4], which occurs in at least some of the veins as well as in the altered wall rock. Since we know the fluid s potassium content (Table 16.1), assuming equilibrium with kaolinite fixes pH according to the reaction... [Pg.233]

In a final application of kinetic reaction modeling, we consider how sodium feldspar (albite, NaAlSi3Ox) might dissolve into a subsurface fluid at 70°C. We consider a Na-Ca-Cl fluid initially in equilibrium with kaolinite [Al2Si2O5(OH)4], quartz, muscovite [KAl3Si3O10(OH)2, a proxy for illite], and calcite (CaCO3), and in contact with a small amount of albite. Feldspar cannot be in equilibrium with quartz and kaolinite, since the minerals will react to form... [Pg.303]

To construct an alternative model of Amazon River water, we assume that equilibrium with kaolinite [a clay mineral, Al2Si2O5(OH)4] and hematite (ferric oxide, Fe2O3) controls the aluminum and iron concentrations ... [Pg.93]

KAlSi3O8 + Al2Si2O5(OH)4 2 SiO2 + KAl3Si3O10(OH)2 + H2O (11.5) K-feldspar kaolinite quartz muscovite... [Pg.168]

CaF2 + - - SiO2 +- KA13(OH)6(SO4)2 + y Al2Si2O5(OH)4 (16.2) fluorite quartz alunite kaolinite... [Pg.234]

NaAlSi3O8 + Al2Si2O5(OH)4 -> NaAl3Si3Oi0(OH)2 + 2 SiO2 +H2O (20.15) albite kaolinite paragonite quartz... [Pg.307]

See other pages where Al2Si2O5 4, kaolinite is mentioned: [Pg.331]    [Pg.349]    [Pg.54]    [Pg.166]    [Pg.278]    [Pg.362]    [Pg.331]    [Pg.349]    [Pg.54]    [Pg.166]    [Pg.278]    [Pg.362]    [Pg.906]    [Pg.906]    [Pg.149]    [Pg.168]    [Pg.233]    [Pg.234]    [Pg.305]    [Pg.306]    [Pg.327]   
See also in sourсe #XX -- [ Pg.4 , Pg.268 ]



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