Materials Data on SrAgSF by Materials Project

Abstract

SrFAgS is Parent of FeAs superconductors structured and crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Sr2+ is bonded in a 4-coordinate geometry to four equivalent S2- and four equivalent F1- atoms. All Sr–S bond lengths are 3.22 Å. All Sr–F bond lengths are 2.50 Å. Ag1+ is bonded to four equivalent S2- atoms to form a mixture of distorted edge and corner-sharing AgS4 tetrahedra. All Ag–S bond lengths are 2.70 Å. S2- is bonded in a 12-coordinate geometry to four equivalent Sr2+ and four equivalent Ag1+ atoms. F1- is bonded to four equivalent Sr2+ atoms to form a mixture of edge and corner-sharing FSr4 tetrahedra.