Thermal evolution of Mg-Al and Ni-Al layered double hydroxides: the structure of the dehydrated phase.
Simulation of X-ray diffraction patterns on the basis of the models of one-dimensional disordered crystals was used to investigate the structure of the dehydrated phase produced by dehydration of Mg-Al and Ni-Al layered double hydroxides at a temperature of ∼473-498 K. It was found that the removal of water molecules transforms the initial structure, which is a mixture of 3R1and 2H1polytypes, into a structure that comprises preferentially fragments of 3R2and 1H polytypes and has some turbostratic disorder.
Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russian Federation.
Svetlana
S
Cherepanova
Institute of Hydrocarbon Processing, Siberian Branch of the Russian Academy of Sciences, Omsk, Russian Federation.
Natalya
N
Leont'eva
Institute of Hydrocarbon Processing, Siberian Branch of the Russian Academy of Sciences, Omsk, Russian Federation.
Vladimir
V
Drozdov
Institute of Hydrocarbon Processing, Siberian Branch of the Russian Academy of Sciences, Omsk, Russian Federation.
Vladimir
V
Doronin
diffraction-pattern simulation; hydrotalcite structure; layered double hydroxides; turbostratic disorder