Engineering Physics Annotation << Back Correlations Between NMR Data, M&#246;ssbauer Spectroscopy and the Parameters of the EFG Tensor for Copper Nodes in Superconducting Metal Oxides RBA2 CU3 O7-x Seregin P.P., Marchenko A.V., Doronin V.A., Kiselev V.S. Linear relations have been established between the quadrupole interaction constants measured by nuclear magnetic resonance on the isotope 63Cu by emission Mössbauer spectroscopy on the isotope 67Zn and the main component tensor of the electric fi eld gradient in copper nodes of ceramic superconductors RBa2 Cu3 O7 . These ratios make it possible, without using any models of charge distribution across the nodes of the crystal lattice, to determine compounds in which copper. Keywords: nuclear magnetic resonance, Mössbauer spectroscopy, electric field gradient tensor. DOI: 10.25791/infizik.2.2026.1532 Pp. 19-24.