Premium
Structural changes in nanocrystalline mackinawite (FeS) at high pressure
Author(s) -
Ehm L.,
Michel F. M.,
Antao S. M.,
Martin C. D.,
Lee P. L.,
Shastri S. D.,
Chupas P. J.,
Parise J. B.
Publication year - 2009
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889808034730
Subject(s) - mackinawite , nanocrystalline material , tetragonal crystal system , chemistry , phase transition , van der waals force , thermodynamics , materials science , crystallography , condensed matter physics , crystal structure , mineralogy , pyrite , physics , organic chemistry , molecule
The high‐pressure behavior of nanocrystalline mackinawite (FeS) with particle sizes of 6, 7 and 8 nm has been investigated by high‐energy X‐ray total scattering and pair distribution function analysis. An irreversible first‐order structural phase transition from tetragonal mackinawite to orthorhombic FeS‐II was observed at about 3 GPa. The transition is induced by the closure of the van der Waals gap in the layered mackinawite structure. A grain size effect on the transition pressure and the compressibility was observed.