Alkali silicate reaction chemistry

Pederson, L. R., McGrail, B. P., McVay, G. L., Petersen-Villalobos, D. A. Settles, N. S. 1993. Kinetics of alkali silicate and aluminosilicate glass reactions in alkali chloride solutions Influence of surface charge. Physics and Chemistry of Glasses, 34, 140-148. 

Orel VP (1982) Studies on the reactions of quartz and alkali silicates with hydroxide—salt melts. PhD (Kandidate) Thesis, Institute of General and Inorganic Chemistry, Kiev... 

Although there are numerous families of lamellar solids, only a handful of them exhibit the kind of versatile intercalation chemistry that forms the basis of this book. In arriving at the content of this volume, the editors have accurately identified six classes of versatile layered compounds that are at the forefront of materials intercalation chemistry, namely, smectite clays, zirconium phosphates and phos-phonates, layered double hydroxides (known informally as hydrotalcites or anionic clays ), layered manganese oxides, layered metal chalcogenides, and lamellar alkali silicates and silicic acids. Graphite and carbon nanotubes have not been included, in part because this specialty area of intercalation chemistry is limited to one or two molecular layers of comparatively small guest species that are capable of undergoing electron transfCT reactions with the host structure. 

Perovskites also exhibit reaction relationships with phosphate minerals and exotic alkali-titanium-silicate minerals under late-stage magmatic conditions. In a systematic study of loparite mineral chemistry in the Lovozero alkaline complex, Russia, Kogarko et al. (2002) have... 

The reactions of cyanide to various minerals are summarized in a report by Hedley and Tabachnik (H21). The conditions for easy extraction of gold from its ore include a high degree of liberation of the gold minerals, a cyanide solution free of impurities, and a sufficient amount of oxygen available in the solution during the reaction. Quartz, silicate minerals, and alkali metal carbonates are relatively insoluble in cyanide solutions. The other metals that are normally associated with most gold and silver ores cause complications in the chemistry of cyanidation. The solubilities of minerals and metals in cyanide solutions are presented in Table II. 

The studies with liquid Si NMR spectroscopy for investigation of the chemistry and kinetics of the hydrolysis and condensation reactions either in alkali metal silicate solutions or in alkoxide sol-gel precursors are abundant and have been very... 

Published experimental studies of mineral/cal-cium hydroxide reactions show that at low temperatures (below 110°C), the chief reaction products are calcium silicate hydrate (CSH) gels, while zeolites and feldspars are formed at higher temperatures and in the presence of alkalis NaOH and KOH. The phase identifications have however often been made by low resolution or bulk methods, neither of which are ideal for such material. Published results of numerical simulations are in broad agreement with those of experimental studies of cement/ rock interaction. These models predict that CSH gels will be replaced by zeolites and maybe feldspars as plume chemistry evolves. 

---