RT Journal Article
T1 The effect of the octahedral cations on thedimensions of the palygorskite cell
A1 Súarez Barrios, Mercedes
A1 García Romero, Emilia
A1 Sánchez del Río, Manuel
A1 Martinetto, Pauline
A1 Dooryhée, Eric
AB High-resolution synchrotron X-ray diffraction recorded on a collection ofpalygorskites with different chemical compositions (obtained by analytical electron microscopy)permits unambiguous correlation of the crystallographic parameters a (or a sin b if a monoclinicphase is considered) with the nature of the octahedral sheet, i.e. with both the number of octahedralpositions that are occupied and the type of octahedral cation. No significant changes in the latticeparameters b and c are observed. The unit cell modification consists essentially of an expansion in aas the number of cations with larger ionic radii (Mg2+ and Fe3+) predominates over smaller cations(Al3+). A linear dependency of a (or a sin b) on the chemical composition of the octahedral sheet wasobtained that can be used for classifying palygorskite into compositional groups, using onlyconventional diffraction data, without the need for chemical analyses.
PB Mineralogical Society
SN 0009-8558
YR 2007
FD 2007
LK https://hdl.handle.net/20.500.14352/50681
UL https://hdl.handle.net/20.500.14352/50681
LA eng
DS Docta Complutense
RD 8 abr 2025