Materials Data on EuCuSF by Materials Project

Abstract

EuCuSF 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 S2- and four equivalent F1- atoms. All Eu–S bond lengths are 3.09 Å. All Eu–F bond lengths are 2.48 Å. Cu1+ is bonded to four equivalent S2- atoms to form a mixture of edge and corner-sharing CuS4 tetrahedra. All Cu–S bond lengths are 2.42 Å. S2- is bonded in a 12-coordinate geometry to four equivalent Eu2+ and four equivalent Cu1+ atoms. F1- is bonded to four equivalent Eu2+ atoms to form a mixture of edge and corner-sharing FEu4 tetrahedra.