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Title: AuO: Evolving from Dis- to Comproportionation and Back Again

Journal Article · · Inorganic Chemistry
 [1];  [2];  [2];  [3]
  1. Univ. of Edinburgh, Scotland (United Kingdom)
  2. Univ. of Warsaw (Poland)
  3. Cornell Univ., Ithaca, NY (United States)

The structural, electronic, and dynamic properties of hypothetical gold(II) oxide (AuO) are studied theoretically, at atmospheric and elevated pressures, with the use of hybrid density functional theory. At $$p$$ = 1 atm, hypothetical AuO (metastable with respect to the elements) is predicted to crystallize in a new structure type, unique among the late-transition-metal monoxides, with disproportionation of the Au ions to AuI/III and featuring aurophilic interactions. Under pressure, familiar structure types are stabilized: a semiconducting AgO-type structure at ~2.5 GPa and, with a further increase of the pressure up to ~80 GPa, an AuSO4-type structure containing Au2 pairs. Finally, above 105 GPa, distorted NaCl- and CsCl-type AuIIO structures dominate, and metallization is predicted at 329 GPa.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Energy Frontier Research in Extreme Environments (EFree)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0001057
OSTI ID:
1371230
Journal Information:
Inorganic Chemistry, Vol. 55, Issue 3; Related Information: EFree partners with Carnegie Institution of Washington (lead); California Institute of Technology; Colorado School of Mines; Cornell University; Lehigh University; Pennsylvania State University; ISSN 0020-1669
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 22 works
Citation information provided by
Web of Science

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Cited By (8)

Mixed-valence Compounds: AuO 2 and AuS journal September 2018
The generalized maximum hardness principle revisited and applied to solids (Part 2) journal January 2017
Dramatic enhancement of spin–spin coupling and quenching of magnetic dimensionality in compressed silver difluoride journal January 2018
Theoretical investigation of the valence states in Au via the Au–F compounds under high pressure journal January 2019
High-temperature superconductivity in alkaline and rare earth polyhydrides at high pressure: A theoretical perspective journal February 2019
Computational prediction of a  +4 oxidation state in Au via compressed AuO 2 compound journal October 2019
Quest for Compounds at the Verge of Charge Transfer Instabilities: The Case of Silver(II) Chloride † journal August 2019
Mixed-valence Compounds: AuO 2 and AuS journal November 2018