data_SrMnB2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.43
_cell_length_b   4.43
_cell_length_c   2.73
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   98.93
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrMnB2
_chemical_formula_sum   'Sr1 Mn1 B2'
_cell_volume   52.91
_cell_formula_units_Z   1
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
  Sr  Sr3  1  0.88  0.0  0.0  1.0
  Mn  Mn2  1  0.0  0.0  0.0  1.0
  B  B0  1  0.44  0.32  0.36  1.0
  B  B1  1  0.44  0.68  0.36  1.0

data_SrMnB2
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.73
_cell_length_b   4.43
_cell_length_c   4.43
_cell_angle_alpha   98.93
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrMnB2
_chemical_formula_sum   'Sr1 Mn1 B2'
_cell_volume   52.91
_cell_formula_units_Z   1
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
  Sr  Sr0  1  -0.0  0.88  0.0  1.0
  Mn  Mn1  1  0.0  0.0  0.0  1.0
  B  B2  1  0.36  0.44  0.32  1.0
  B  B3  1  0.36  0.44  0.68  1.0

Sr Mn B B
SrMnB2 crystallizes in the triclinic P1 space group. Sr(1) is bonded in a single-bond geometry to one Mn(1), two equivalent B(1), and two equivalent B(2) atoms. The Sr(1)-Mn(1) bond length is 0.53 Å. There is one shorter (2.76 Å) and one longer (3.10 Å) Sr(1)-B(1) bond length. There is one shorter (2.43 Å) and one longer (2.81 Å) Sr(1)-B(2) bond length. Mn(1) is bonded in a single-bond geometry to one Sr(1), one B(2), and two equivalent B(1) atoms. The Mn(1)-B(2) bond length is 2.76 Å. There is one shorter (2.43 Å) and one longer (2.81 Å) Mn(1)-B(1) bond length. There are two inequivalent B sites. In the first B site, B(1) is bonded in a 5-coordinate geometry to two equivalent Sr(1), two equivalent Mn(1), and one B(2) atom. The B(1)-B(2) bond length is 1.63 Å. In the second B site, B(2) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Mn(1), and one B(1) atom.