Zeitschrift für Kristallographie. New Crystal Structures vol:suppl. 30 issue:suppl. 30 pages:395-400
European Powder Diffraction Conference edition:11 location:Warsaw date:19-22 september 2008
The crystal structures of a highly pure, sedimentary clinoptilolite and the Na-, K-, and Ca-exchanged forms were refined by the Rietveld method using X-ray diffraction data collected with both conventional and synchrotron sources and different instrumental geometries. The refined structures showed that the clinoptilolite framework is not sensitive to cation exchange with Na+, K+ or Ca2+. The M1 extraframework cation site is occupied by Na, Ca, and Ba M2 by Ca, M3 by K, and M4 by Mg. The M1 site occupancy significantly influences the configuration of extraframework water molecules.