| dc.contributor.author | Janeba, Daniel | |
| dc.contributor.author | Čapková, Pavla | |
| dc.contributor.author | Weiss, Zdeněk | |
| dc.contributor.author | Schenk, Henk | |
| dc.date.accessioned | 2007-08-22T08:38:26Z | |
| dc.date.available | 2007-08-22T08:38:26Z | |
| dc.date.issued | 1998 | |
| dc.identifier.citation | Clays and Clay Minerals. 1998, vol. 46, no. 1, p. 63-68. | en |
| dc.identifier.issn | 0009-8604 | |
| dc.identifier.uri | http://hdl.handle.net/10084/62160 | |
| dc.language.iso | en | en |
| dc.publisher | Clay Minerals Society | en |
| dc.relation.ispartofseries | Clays and Clay Minerals | en |
| dc.relation.uri | http://dx.doi.org/10.1346/CCMN.1998.0460107 | en |
| dc.subject | montmorillonite | en |
| dc.subject | profile analysis | en |
| dc.subject | smectite | en |
| dc.subject | XRD | en |
| dc.title | Characterization of intercalated smectites using XRD profile analysis in the low-angle region | en |
| dc.type | article | en |
| dc.identifier.location | Ve fondu ÚK | en |
| dc.description.abstract-en | X-ray diffraction (XRD) characterization of natural and intercalated smectites is usually limited
to the apparent d-value estimated from the peak maxima in the raw data. This can lead to the
misinterpretation of the measured data. In the case of XRD, the interference function is modulated by
instrumental factors (Lorentz-polarization factor, diffraction geometry) and physical factors (structure
factor, surface roughness effect). These effects lead to diffraction profile distortions, depending on the
diffraction angle and peak full width at half maximum (FWHM). As a result, the diffraction profiles for
structures with large line broadening (FWHM > 1°)exhibit a significant peak shift (Delta d similar to 1.5 Å), especially
at low angles (2 theta less than or equal to 10 degrees). The present work deals with the detailed analysis of all these effects,
their corrections and their consequences for the interpretation of diffraction patterns (including possible
errors in determining lattice parameters or the structure model). The investigated materials were montmorillonites
(MMT) intercalated with hydroxy-A1 polymers. Diffraction profile analysis revealed the corrected
d-values and showed that the intercalated sample is not a mixed-layered structure. As a result a
structural model of the interlayer is presented. | en |
| dc.identifier.doi | 10.1346/CCMN.1998.0460107 | |
| dc.identifier.wos | 000072700800007 | |