Materials Data on BaAlGeF by Materials Project
BaAlGeF is Parent of FeAs superconductors structured and crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Ba is bonded in a 4-coordinate geometry to four equivalent Ge and four equivalent F atoms. All Ba–Ge bond lengths are 3.54 Å. All Ba–F bond lengths are 2.66 Å. Al is bonded to four equivalent Ge atoms to form a mixture of corner and edge-sharing AlGe4 tetrahedra. All Al–Ge bond lengths are 2.64 Å. Ge is bonded in a 8-coordinate geometry to four equivalent Ba and four equivalent Al atoms. F is bonded to four equivalent Ba atoms to form a mixture of corner and edge-sharing FBa4 tetrahedra.
36 MATERIALS SCIENCE↗