The material structure described by 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. is represented by the CIF card [CIF]
data_PmBr2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.445
_cell_length_b   7.445
_cell_length_c   3.699
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   205.051
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Pm  Pm0  1  0.000  0.000  0.000  1.0
  Pm  Pm1  1  0.500  0.500  0.500  1.0
  Br  Br2  1  0.280  0.280  0.000  1.0
  Br  Br3  1  0.720  0.720  0.000  1.0
  Br  Br4  1  0.220  0.780  0.500  1.0
  Br  Br5  1  0.780  0.220  0.500  1.0
[/CIF]
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The material structure described by 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. is represented by the CIF card [CIF]
data_PmBr2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.445
_cell_length_b   7.445
_cell_length_c   3.699
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   205.051
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Pm  Pm0  1  0.000  0.000  0.000  1.0
  Pm  Pm1  1  0.500  0.500  0.500  1.0
  Br  Br2  1  0.280  0.280  0.000  1.0
  Br  Br3  1  0.720  0.720  0.000  1.0
  Br  Br4  1  0.220  0.780  0.500  1.0
  Br  Br5  1  0.780  0.220  0.500  1.0
[/CIF]
.