UCL logo

UCL Discovery

UCL home » Library Services » Electronic resources » UCL Discovery

The high-temperature superionic behaviour of Ag<inf>2</inf>S

Hull, S; Keen, DA; Sivia, DS; Madden, PA; Wilson, M; (2002) The high-temperature superionic behaviour of Ag<inf>2</inf>S. Journal of Physics Condensed Matter , 14 (1) 10.1088/0953-8984/14/1/102.

Full text not available from this repository.


Powder neutron diffraction and molecular dynamics (MD) simulations have been used to investigate the structural behaviour of silver sulfide, Ag2S, at elevated temperatures. Above ∼450 K Ag2S adopts the β phase in which the S2- posses a body-centred cubic arrangement. Analysis of the neutron diffraction is in good agreement with the previously proposed structural model in which the Ag+ predominantly reside within the tetrahedral interstices. At ∼865 K Ag2S transforms to the α phase in which the anion sublattice adopts a face-centred cubic arrangement. Structural refinements of this phase indicate that the cations are distributed predominantly in the tetrahedral cavities but with a significant fraction in the octahedral holes. MD simulations, using established potentials for this compound, confirm the stability of the two high-temperature superionic phases and show good agreement with the measured Ag+ distribution within the unit cell.

Type: Article
Title: The high-temperature superionic behaviour of Ag<inf>2</inf>S
DOI: 10.1088/0953-8984/14/1/102
UCL classification: UCL > School of BEAMS
UCL > School of BEAMS > Faculty of Maths and Physical Sciences
URI: http://discovery.ucl.ac.uk/id/eprint/190998
Downloads since deposit
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item