Open AccessEXAFS study of PbS–SnS solid solution
Author(s) -
Lebedev Alexander,
Sluchinskaya Irina,
Munro Ian
Publication year - 2001
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049500019804
Subject(s) - orthorhombic crystal system , extended x ray absorption fine structure , solid solution , crystallography , lone pair , atom (system on chip) , metal , bond length , chemistry , shell (structure) , materials science , crystal structure , molecule , physics , absorption spectroscopy , optics , organic chemistry , computer science , embedded system , composite material
The local environment of the Pb atom in Pb x Sn 1‐ x S solid solution was studied by EXAFS technique. The shortest Pb—S bond length in orthorhombic samples was found to be by ≃0.2 Å shorter than in cubic PbS. This indicates that the 6 s 2 lone pair of Pb is stereochemically active in the SnS host. Strong correlations found in the distribution of metal atoms in the second shell show that the orthorhombic samples can be considered as solid solutions with unexpectedly strong short‐range order. One can expect that the short‐range order in PbSnS 2 may result in formation of superstructures with space groups C 2 v 7 or C 2 v 2 .