. . . . "261614" . "P\u00ED\u0161kov\u00E1, A." . . "Ve\u010Dern\u00EDkov\u00E1, Eva" . "[7041E01306B2]" . "Lang, Kamil" . "5"^^ . "0169-1317" . . . "High-temperature X-ray powder diffraction as a tool for characterization of smectites, layered double hydroxides, and their intercalates with porphyrins" . . . "NL - Nizozemsko" . "smectite; Layered double hydroxides; thermal decomposition"@en . "RIV/61388980:_____/10:00347201!RIV11-GA0-61388980" . "49" . . "8"^^ . . "4" . . "Applied Clay Science" . . "Hradil, David" . "Bezdi\u010Dka, Petr" . "Grygar, Tom\u00E1\u0161" . "000281425700004" . "RIV/61388980:_____/10:00347201" . . . "Kovanda, F." . "K\u00E1fu\u0148kov\u00E1, E." . "We have analyzed expandable clay minerals and layered double hydroxides with different interlayer ions by high-temperature X-ray powder diffraction (HT-XRD) with comparison to thermal analysis (DTG/DTA) coupled with evolved gas analysis (EGA). We described in detail their thermal behaviour with emphasis to the differences among samples related to their crystallochemical characteristics. Porphyrin-intercalated smectites have a quite unique thermal behaviour as monitored by HT-XRD; the intercalates with tetrakis (1-methyl-4-pyridinio)porphyrin have a basal spacing of about 1.4 nm and are thermally stable up to ca. 600 degrees C. The resolution of the individual dehydration steps of smectites (from 2-layer hydrate via 1-layer hydrate to the anhydrous form) is much better in HT-XRD then in DTG/EGA curves. Layered double hydroxides (LDHs) have a varying thermal stability depending on their chemical composition and crystallinity."@en . "High-temperature X-ray powder diffraction as a tool for characterization of smectites, layered double hydroxides, and their intercalates with porphyrins"@en . "High-temperature X-ray powder diffraction as a tool for characterization of smectites, layered double hydroxides, and their intercalates with porphyrins"@en . . "We have analyzed expandable clay minerals and layered double hydroxides with different interlayer ions by high-temperature X-ray powder diffraction (HT-XRD) with comparison to thermal analysis (DTG/DTA) coupled with evolved gas analysis (EGA). We described in detail their thermal behaviour with emphasis to the differences among samples related to their crystallochemical characteristics. Porphyrin-intercalated smectites have a quite unique thermal behaviour as monitored by HT-XRD; the intercalates with tetrakis (1-methyl-4-pyridinio)porphyrin have a basal spacing of about 1.4 nm and are thermally stable up to ca. 600 degrees C. The resolution of the individual dehydration steps of smectites (from 2-layer hydrate via 1-layer hydrate to the anhydrous form) is much better in HT-XRD then in DTG/EGA curves. Layered double hydroxides (LDHs) have a varying thermal stability depending on their chemical composition and crystallinity." . . . "P(GA203/06/1244), P(IAA3032401), P(KAN100500651), Z(AV0Z40320502)" . . . . "9"^^ . . . "High-temperature X-ray powder diffraction as a tool for characterization of smectites, layered double hydroxides, and their intercalates with porphyrins" .