Materials Data on KMgBi by Materials Project
KMgBi is Matlockite structured and crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. K is bonded in a 5-coordinate geometry to five equivalent Bi atoms. There are four shorter (3.70 Å) and one longer (3.78 Å) K–Bi bond lengths. Mg is bonded to four equivalent Bi atoms to form a mixture of edge and corner-sharing MgBi4 tetrahedra. All Mg–Bi bond lengths are 3.03 Å. Bi is bonded in a 9-coordinate geometry to five equivalent K and four equivalent Mg atoms.
36 MATERIALS SCIENCE↗