Structural changes in nanocrystalline mackinawite (FeS) at high pressure | Zendy

Ehm L. | Zendy; Michel F. M. | Zendy; Antao S. M. | Zendy; Martin C. D. | Zendy; Lee P. L. | Zendy; Shastri S. D. | Zendy; Chupas P. J. | Zendy; Parise J. B. | Zendy

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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.

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