Chapter 8. SILICA-WATER INTERACTIONS

The effect of Al on Si isotope fractionation investigated by silica precipitation experiments

“…We propose further that net precipitation and net dissolution both follow a first-order rate law, as shown for quartz dissolution-precipitation reactions (Dove and Rimstidt, 1994;see Online Supplement B). An important prerequisite of this model is that the Si fixated during freezing can dissolve rapidly during thawing.…”

Occurrence of polymerized silicic acid and aluminum species in two forest soil solutions with different acidity

“…Dove and Rimstidt, 1994). At pH values above~9 deprotonation of H 4 SiO 4°o ccurs, which results in significant concentrations of negatively charged monosilicic species in alkaline solutions.…”

Defect distribution and dissolution morphologies on low-index surfaces of α-quartz

“…Unlike many other minerals, it dissolves and precipitates under mild conditions in a wide variety of aqueous environmental systems (Bennett, 1991;Bavestrello et al, 1995;Bolton et al, 1996;Schulz and White, 1999;Bennett et al, 2001;Wagner and Jochum, 2002;Gaylarde and Gaylarde, 2004;Greenwood et al, 2005). Quartz dissolution has consequently been the subject of multiple studies (see, e.g., Rimstidt and Barnes, 1980;Dove and Elston, 1992;House and Orr, 1992;Dove and Rimstidt, 1994;Dove, 1994Dove, , 1995Dove, , 1999Tester et al, 1994;Hajash et al, 1998;Duval et al, 2002;Greenwood et al, 2005).…”

“…Most works were performed using bulk materials (e.g., sand and crushed crystals) that usually have complex surface geometries (e.g., Rimstidt and Barnes, 1980;Brady and Walther, 1990;Dove and Elston, 1992;Dove and Rimstidt, 1994;Jendoubi et al, 1998;Dove, 1999;Alekseyev et al, 2003). These studies have provided useful insight into the dissolution behavior of quartz crystals with realistic surfaces; however, they did not differentiate between the contribution of specific classes of surface morphological features (such as facets of various crystallographic orientations, crystal voids, etc.)…”