6533b827fe1ef96bd128661c

RESEARCH PRODUCT

Structural Characterization of Aurophilic Gold(I) Iodide under High Pressure

S. Gallego-parraJuan Angel SansSrungarpu N. AcharyVirginia MonteseguroDaniel ErrandoneaCatalin PopescuF. Javier Manjón

subject

Diffractionchemistry.chemical_classification010405 organic chemistryIodidemacromolecular substancesCrystal structure010402 general chemistry01 natural sciences0104 chemical sciencesCharacterization (materials science)Inorganic ChemistryCrystallographyTetragonal crystal systemstomatognathic systemchemistryHigh pressureFISICA APLICADAPhysical and Theoretical Chemistry

description

[EN] The effects of pressure on the crystal structure of aurophilic tetragonal gold iodide have been studied by means of powder X-ray diffraction up to 13.5 GPa. We found evidence of the onset of a phase transition at 1.5 GPa that is more significant from 3.8 GPa. The low- and high-pressure phases coexist up to 10.7 GPa. Beyond 10.7 GPa, an irreversible process of amorphization takes place. We determined the axial and bulk compressibility of the ambient-pressure tetragonal phase of gold iodide up to 3.3 GPa. This is extremely compressible with a bulk modulus of 18.1(8) GPa, being as soft as a rare gas, molecular solids, or organometallic compounds. Moreover, its response to pressure is anisotropic.

yearjournalcountryeditionlanguage
2019-08-08
10.1021/acs.inorgchem.9b00433https://doi.org/10.1021/acs.inorgchem.9b00433