Crystal structure of Kuzel's salt 3CaO-Al_2O_3-1/2CaSO_4-1/2CaCl_2-11H_2O determined by synchrotron powder diffraction

摘要

The crystal structure of Kuzel's salt has been successfully determined by synchrotron powder diffraction. It crystallizes in the rhombohedral R3 symmetry with a = 5.7508 (2) A, c = 50.418 (3) A, V = 1444.04 (11) A~3. 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.