Electronic properties of gold–aluminium intermetallic compounds

Abstract

The intermetallic compounds in the Au–Al system were studied by 197Au Mössbauer spectroscopy. The observed isomer shifts and electric quadrupole splittings are compared with the electron densities and electric field gradients at the gold nuclei obtained by LAPW calculations using the WIEN97 computer code. This provides insights into the electronic structure of Au–Al alloys and yields values for the groundstate quadrupole moment of 197Au and for the change of the nuclear charge radius for the 77 keV transition of 197Au.