data_SrMnAs2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.18
_cell_length_b   3.18
_cell_length_c   7.41
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrMnAs2
_chemical_formula_sum   'Sr1 Mn1 As2'
_cell_volume   75.07
_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  0.0  0.0  0.71  1.0
  Mn  Mn2  1  0.0  0.0  0.0  1.0
  As  As0  1  0.59  0.59  0.02  1.0
  As  As1  1  0.59  0.59  0.39  1.0

data_SrMnAs2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.5
_cell_length_b   4.5
_cell_length_c   7.41
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SrMnAs2
_chemical_formula_sum   'Sr2 Mn2 As4'
_cell_volume   150.14
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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  2  0.0  0.0  0.71  1.0
  Mn  Mn1  2  0.0  0.0  0.0  1.0
  As  As2  2  0.09  0.5  0.02  1.0
  As  As3  2  0.09  0.5  0.39  1.0

Sr Mn As As
SrMnAs2 crystallizes in the monoclinic Cm space group. Sr(1) is bonded in a 1-coordinate geometry to one Mn(1) and four equivalent As(2) atoms. The Sr(1)-Mn(1) bond length is 2.18 Å. There are a spread of Sr(1)-As(2) bond distances ranging from 2.97-3.54 Å. Mn(1) is bonded to one Sr(1) and four equivalent As(1) atoms to form a mixture of distorted edge and corner-sharing MnSrAs4 square pyramids. There are a spread of Mn(1)-As(1) bond distances ranging from 1.85-2.67 Å. There are two inequivalent As sites. In the first As site, As(1) is bonded in a 4-coordinate geometry to four equivalent Mn(1) and one As(2) atom. The As(1)-As(2) bond length is 2.75 Å. In the second As site, As(2) is bonded in a 5-coordinate geometry to four equivalent Sr(1) and one As(1) atom.