Theoretical and super(27)Al CPMAS NMR investigation of aluminum coordination changes during aluminosilicate dissolution

• Published in: Geochimica et cosmochimica acta Vol. 69; no. 9; pp. 2205 - 2220
• Main Authors: Criscenti, L J, Brantley, S L, Mueller, K T, Tsomaia, N, Kubicki, J D
• Format: Journal Article
• Language: English
• Published: 01.05.2005
• Subjects: Aluminosilicates; Aluminum; Aluminum silicates; Clusters; Dissolution; Feldspars; Mathematical analysis; Surface chemistry

Ab initio molecular orbital calculations were performed, and super(27)Al CP MAS-NMR spectra were evaluated in order to investigate the possible tetrahedral to octahedral coordination change of Al at the feldspar-water interface under acidic conditions. Aluminum coordination is octahedral in solution...