Abstract
AbstractThe effective atomic charges for all sites of the RBa2Cu3O7 lattices have been found using our Mössbauer data withthe 67Cu(67Zn),133Ba(133Cs), 155Eu(155Gd) isotopes, our calculations of the lattice electric field gradient (EFG) at the lattice sites, as well as the 17O NMR data available in literature. The charges show holes placed in the chain oxygen sublattice mainly. The Cu2+ Sternheimer factor has been estimated and the Cu2+ valence EFG in YBa2Cu37 has been found. The z‐axes of the total, lattice, and valence EFG tensors for Cu(2) coincide with the crystal axis c. For Cu(1) they coincide with the axes b, a, and a, respectively.
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