Variación de la energía libre de Gibbs de la caolinita en función de la cristalinidad y tamaño de partícula

A. La Iglesia

doi:10.3989/egeol.89455-6497

Variación de la energía libre de Gibbs de la caolinita en función de la cristalinidad y tamaño de partícula

Authors

A. La Iglesia Instituto de Geología Económica. C.S.I.C. Facultad de Ciencias Geológicas. Universidad Complutense

DOI:

https://doi.org/10.3989/egeol.89455-6497

Keywords:

kaolinite, standard free energy, crystallinity, particle size, solubility

Abstract

The effect of grinding on crystallinity, particle size and solubility of two samples of kaolinite was studied. The standard Gibbs free energies of formation of different ground samples were calculated from solubility measurements, and show a direct relationship between Gibbs free energy and particle size-crystallinity variation. Values of -3752.2 and -3776.4 KJ/mol. were determinated for ΔGº_l (am) and ΔGº_l (crys) of kaolinite, respectively. A new thermodinamic equation that relates ΔGº_l to particle size is proposed. This equation can probably be extended to clay mineals.

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Published

1989-12-30

How to Cite

La Iglesia, A. (1989). Variación de la energía libre de Gibbs de la caolinita en función de la cristalinidad y tamaño de partícula. Estudios Geológicos, 45(5-6), 241–249. https://doi.org/10.3989/egeol.89455-6497

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Issue

Vol. 45 No. 5-6 (1989)

Section

Articles

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