The distribution of the electron density and spin density in the interplanar areas CuFeS2 by NMR 63,65Cu in a local fieldAleksandr Pogoreltsev, Vadim Matukhin, Ekaterina Shmidt, Valery Galiakhmetov and Yaroslav ShaikhutdinovE3S Web Conf., 288 (2021) 01050DOI: https://doi.org/10.1051/e3sconf/202128801050