A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Crystal structure of Kuzel's salt 3CaO·Al2O3·1/2CaSO4·1/2CaCl2·11H2O determined by synchrotron powder diffraction
Abstract The crystal structure of Kuzel's salt has been successfully determined by synchrotron powder diffraction. It crystallizes in the rhombohedral R3̅ symmetry with a =5.7508 (2) Å, c =50.418 (3) Å, V=1444.04 (11) Å3. Joint Rietveld refinement was realized using three X-ray powder patterns recorded with a unique wavelength and three different sample-to-detector distances. Kuzel's salt is the chloro-sulfoaluminate AFm phase and belongs to the layered double hydroxide (LDH) large family. Its structure is composed of positively charged main layer [Ca2Al(OH)6]+ and negatively charged interlayer [Cl0.50·(SO4)0.25·2.5H2O]−. Chloride and sulfate anions are ordered into two independent crystallographic sites and fill successive interlayer leading to the formation of a second-stage compound. The two kinds of interlayer have the compositions [Cl·2H2O]− and [(SO4)0.5·3H2O]−. The crystal structure explains why chloride and sulfate anions are not substituted and why the formation of extended solid solution in the chloro-sulfate AFm system does not occur.
Crystal structure of Kuzel's salt 3CaO·Al2O3·1/2CaSO4·1/2CaCl2·11H2O determined by synchrotron powder diffraction
Abstract The crystal structure of Kuzel's salt has been successfully determined by synchrotron powder diffraction. It crystallizes in the rhombohedral R3̅ symmetry with a =5.7508 (2) Å, c =50.418 (3) Å, V=1444.04 (11) Å3. Joint Rietveld refinement was realized using three X-ray powder patterns recorded with a unique wavelength and three different sample-to-detector distances. Kuzel's salt is the chloro-sulfoaluminate AFm phase and belongs to the layered double hydroxide (LDH) large family. Its structure is composed of positively charged main layer [Ca2Al(OH)6]+ and negatively charged interlayer [Cl0.50·(SO4)0.25·2.5H2O]−. Chloride and sulfate anions are ordered into two independent crystallographic sites and fill successive interlayer leading to the formation of a second-stage compound. The two kinds of interlayer have the compositions [Cl·2H2O]− and [(SO4)0.5·3H2O]−. The crystal structure explains why chloride and sulfate anions are not substituted and why the formation of extended solid solution in the chloro-sulfate AFm system does not occur.
Crystal structure of Kuzel's salt 3CaO·Al2O3·1/2CaSO4·1/2CaCl2·11H2O determined by synchrotron powder diffraction
Mesbah, Adel (author) / François, Michel (author) / Cau-dit-Coumes, Céline (author) / Frizon, Fabien (author) / Filinchuk, Yaroslav (author) / Leroux, Fabrice (author) / Ravaux, Johann (author) / Renaudin, Guillaume (author)
Cement and Concrete Research ; 41 ; 504-509
2011-01-19
6 pages
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2011
| British Library Online Contents | 2002
Crystal structures of leucites from synchrotron X-ray powder diffraction data
| British Library Online Contents | 1993