Abstract
By a method NQR 63,65Cu the synthesized standard of covellite was studied. The experimental values of quadrupole frequency νQ and parameter of asymmetry η were used for research of distribution of electronic density and Laplacian of the electron density in area of quadrupole kernel in position of Cu1. It is set that connection of Cu - S in position of Cu1 is mainly ionic tipe, and size of gap of LUMO - HOMO diminishes with the increase of temperature.
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