PmBr2 is trigonal omega-like structured and crystallizes in the tetragonal P4_2/mnm space group. Pm(1) is bonded to six equivalent Br(1) atoms to form a mixture of edge and corner-sharing PmBr6 octahedra. The corner-sharing octahedral tilt angles are 39°. Br(1) is bonded in a 3-coordinate geometry to three equivalent Pm(1) atoms.
PmBr2 is trigonal omega-like structured and crystallizes in the tetragonal P4_2/mnm space group. Pm(1) is bonded to six equivalent Br(1) atoms to form a mixture of edge and corner-sharing PmBr6 octahedra. The corner-sharing octahedral tilt angles are 39°. There are two shorter (2.95 Å) and four longer (2.96 Å) Pm(1)-Br(1) bond lengths. Br(1) is bonded in a 3-coordinate geometry to three equivalent Pm(1) atoms.