Materials Data on EuCuTeF by Materials Project
EuCuTeF is Parent of FeAs superconductors structured and crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Eu2+ is bonded in a 4-coordinate geometry to four equivalent Te2- and four equivalent F1- atoms. All Eu–Te bond lengths are 3.37 Å. All Eu–F bond lengths are 2.54 Å. Cu1+ is bonded to four equivalent Te2- atoms to form CuTe4 tetrahedra that share corners with four equivalent CuTe4 tetrahedra, corners with twelve equivalent FEu4Te4 tetrahedra, edges with two equivalent FEu4Te4 tetrahedra, and edges with four equivalent CuTe4 tetrahedra. All Cu–Te bond lengths are 2.67 Å. Te2- is bonded in a 12-coordinate geometry to four equivalent Eu2+, four equivalent Cu1+, and four equivalent F1- atoms. All Te–F bond lengths are 3.64 Å. F1- is bonded to four equivalent Eu2+ and four equivalent Te2- atoms to form FEu4Te4 tetrahedra that share corners with twelve equivalent CuTe4 tetrahedra, edges with two equivalent CuTe4 tetrahedra, edges with four equivalent FEu4Te4 tetrahedra, and faces with four equivalent FEu4Te4 tetrahedra.