title: Aqueous alkali-metal silicate anions containing fully condensed four-coordinate sites.
abstract: Conspicuous absence: (29)SiNMR studies show that highly condensed, four-coordinate Si-containing anions are common in concentrated alkali-metal silicate solutions, but reveal no evidence for the existence of specialized zeolite building units. The results add to the mounting evidence that silicate polymerization simply proceeds through stepwise condensation of monosilicate tetrahedra.
authors.affiliation: School of Chemical Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
authors.forename: Christopher T G
authors.initials: CT
authors.lastname: Knight
authors.forename: Raymond J
authors.initials: RJ
authors.lastname: Balec
authors.forename: Stephen D
authors.initials: SD
authors.lastname: Kinrade
mesh_terms: D000838:Anions / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008672:Metals, Alkali / Q000737:chemistry*; D017640:Silicates / Q000737:chemistry*; D017641:Zeolites / Q000737:chemistry*
chemical_list: D000838:Anions; D008672:Metals, Alkali; D017640:Silicates; D017641:Zeolites