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

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

Virginia Monteseguro, Daniel Errandonea, Srungarpu N Achary, Juan A Sans, F Javier Manjón, Samuel Gallego-Parra, Catalin Popescu

Inorg Chem. 2019 Aug 19;58(16):10665-10670.

PMID: 31389700

Abstract:

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.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP10294312	Gold(I) iodide		10294-31-2	Price

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