Fluid supersaturation and crystallization in porous media

Putnis, Andrew; Prieto, M.; Fernández-Dı́az, Lurdes

doi:10.1017/s0016756800011389

Cited by 171 publications

(163 citation statements)

References 36 publications

Supporting

Mentioning

155

Contrasting

Unclassified

Order By: Relevance

“…This explains the dependence of the nucleation density of cerussite on the initial Na2C03 concentration in the aqueous solution. When nucleation occurs, as in the present experiments under a changing supersaturation, the rate of creation of supersaturation determines the value of the supersaturation threshold at the nucleation time (Putnis et al 1995). A higher initial Na2C03 concentration therefore results in a higher supersaturation threshold for nucleation.…”

Section: Evolution Of Supersaturation During the Dissolution-precipitsupporting

confidence: 52%

In situ atomic force microscope observations of a dissolution–crystallisation reaction: the phosgenite–cerussite transformation

Pina

Fernández-Dı́az

Prieto

et al. 2000

Geochimica et Cosmochimica Acta

View full text Add to dashboard Cite

Abstract-The dissolution-reprecipitation reaction of phosgenite (Pb2CI2C03) to cerussite (PbC03) has been observed in situ in a fluid cell of an atomic force microscope (AFM). The (00 I) face of phosgenite, in contact with static carbonated aqueous solutions, rapidly begins to dissolve. AFM observations show that dissolution occurs by generation and spread of square-shaped etch pits with sides parallel to (I 10) directions. The dissolution of the (110) steps is isotropic and the etch pits therefore remain square shaped during the dissolution process, as dictated by the existence of a fourfold axis perpendicular to the phosgenite (00 I) face. Two types of (110) etch pits were found: short-lived shallow pits, of one unit cell depth (8.8 A), and deep pits, which rapidly reach depths between 10 and 60 nrn. A few minutes after the dissolution begins, only the deep pits remain and subsequent dissolution of the phosgenite (001) surface proceeds by increasing their width and depth. The increase of Pb 2 + and CO�-concentration in the aqueous solution as a consequence of the dissolution sharply increases the supersaturation for PbC03. As a result, after a certain incubation time, cerussite crystals nucleate on the phosgenite (001) surface and a coupled process of dissolution-crystallisation starts. Cerussite crystals, which grow by a spiral-growth mechanism, distort the concentration field around them. As a consequence, phosgenite dissolution is accelerated in the proximity of such growing cerussite individuals and both the fonnation of new deep etch pits and the development of irregular dissolution fronts are observed. Further phosgenite dissolution leads to an increase of cerussite nucleation and growth rates, in such a way that this dissolution-crystallisation phenomenon can be considered as an autocatalytic process.

show abstract

Section: Evolution Of Supersaturation During the Dissolution-precipitsupporting

confidence: 52%

In situ atomic force microscope observations of a dissolution–crystallisation reaction: the phosgenite–cerussite transformation

Pina

Fernández-Dı́az

Prieto

et al. 2000

Geochimica et Cosmochimica Acta

View full text Add to dashboard Cite

show abstract

“…The pore space and its properties significantly affects the weathering resistance of a natural building stone, since the pore space coevally rules the water balance (Fitzner 1988;Fitzner and Snethlage 1982;Putnis et al 1995;Putnis and Mauthe 2000;Ruedrich et al 2010a). Therefore, properties such as capillary water uptake, water vapour diffusion and saturation degree correlate in the present study with the porosities of the rocks.…”

Section: Discussion and Summarymentioning

confidence: 62%

“…These properties make them highly relevant for the water balance in rocks (Fitzner 1988;Fitzner and Snethlage 1982;Putnis et al 1995;Putnis and Mauthe 2000;Siegesmund and Dürrast 2011). Thus, to characterise the structural and engineering qualifications of natural building stones, it is necessary to analyse the pore space properties and its influence on the water transport and retention properties.…”

Section: Dimension Stones: Petrophysical Propertiesmentioning

confidence: 99%

Weathering behaviour and construction suitability of dimension stones from the Drei Gleichen area (Thuringia, Germany)

2011

View full text Add to dashboard Cite

The construction suitability of a dimension stone depends on its weathering properties along with the petrology and the petrophysical properties. The aim of this study was to evaluate the suitability of the dimension stones from the ''Drei Gleichen'' area for construction and replacement purposes. In total, six sandstones (Ingersleben, Wachsenburg, Hindfelden, Seeberg, Röhnberg, Gleichenberg; Upper Triassic) as well as two carbonates (Wachsenburg sinter; Quaternary, Wandersleben dolomite; Middle Triassic) were analysed. The results from our laboratory and on-site studies of the dimension stones show that rocks from the same stratigraphic layer, like the sandstones from the upper Triassic, can show major differences in their petrophysical and weathering properties. These differences are attributed to their different diagenesis, resulting, e.g. in varying pore space, water balance and strength properties. The pore size distribution can be divided into four different groups based on their occurring maxima and micropore content. The determined water balance properties as well as moisture expansion and salt attack depend on these groups. Next to this, the mineralogical composition significantly influences the weathering resistance. Sandstones with a high content of altered lithoclasts show a high amount of moisture expansion, low strength and, in consequence, a low weathering resistance against salt attack. Based on the results of the present study, an evaluation of construction suitability could be accomplished. From the analysed sandstones, only the Seebergen sandstone is suitable for construction purposes due to its good availability, good strength properties (high compressive and tensile strength, low softening degree) as well as a low porosity. Furthermore, the Wachsenburg sandstone also shows good petrophysical and petrological properties, but exploitable deposits are too sparse to be of commercial interest. From the carbonates, the Wachsenburg sinter shows very suitable rock parameters, but only sparse outcrops occur, which are not appropriate for mining.

show abstract

“…For the Mn-Ca-COrH 2 0 SS-AS system, the function f3(x) that expresses the supersaturation of aqueous solutions with respect to solid solutions has the following form (e.g., Prieto et al, 1993;Putnis et al, 1995):…”

Section: Supersaturation Evaluationmentioning

confidence: 99%

Molecular-scale surface processes during the growth of calcite in the presence of manganese

Astilleros

Pina

Fernndez-daz

et al. 2002

Geochimica et Cosmochimica Acta

View full text Add to dashboard Cite

Abstract-This paper deals with the growth behaviour of the Mn-Ca-C0 3 -H 2 0 solid solution-aqueous solution system on calcite {1O I 4} surfaces. This system represents a model example, which allows us to study the effect of a number of controlling factors on the crystallisation: (1) the supersaturation function, (3(x), and nucleation rate function, J(x), for the Mn-Ca-C0 3 -H 2 0 system, (2) the relationship of such functions to the molecular scale growth mechanisms operating on growing surfaces, and (3) the surface structure of the calcite {1O I 4} faces. In situ atomic force microscopy (AFM) growth experiments revealed a wide variety of surface phenomena, such as the transition between growth mechanisms, anisotropic changes in the step rates, and the influence of the Mn-bearing newly formed surface on subsequent growth (step stoppage followed by the formation of two-dimensional nuclei and the reproduction of the original calcite {1014} surface microtopog raphy). These phenomena result from the interplay between the controlling parameters and are explained in those terms.

show abstract

Fluid supersaturation and crystallization in porous media

Cited by 171 publications

References 36 publications

In situ atomic force microscope observations of a dissolution–crystallisation reaction: the phosgenite–cerussite transformation

In situ atomic force microscope observations of a dissolution–crystallisation reaction: the phosgenite–cerussite transformation

Weathering behaviour and construction suitability of dimension stones from the Drei Gleichen area (Thuringia, Germany)

Molecular-scale surface processes during the growth of calcite in the presence of manganese

Contact Info

Product

Resources

About