data_SrMnAs2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.34
_cell_length_b   3.34
_cell_length_c   7.17
_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   79.79
_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  0.67  0.67  0.39  1.0
  Mn  Mn2  1  0.0  0.0  0.83  1.0
  As  As0  1  0.0  0.0  0.36  1.0
  As  As1  1  0.67  0.67  0.18  1.0

data_SrMnAs2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.72
_cell_length_b   4.72
_cell_length_c   7.17
_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   159.57
_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  0.17  0.5  0.39  1.0
  Mn  Mn1  2  0.0  0.0  0.83  1.0
  As  As2  2  0.0  0.0  0.36  1.0
  As  As3  2  0.17  0.5  0.18  1.0

Sr Mn As As
Sr Mn As As 0 2 + + o 0 3 o o o 0 1 + + o 1 3 - - + 1 3 - o + 1 3 o - + 1 1 + o o 1 1 o + o 1 2 o o o 1 2 o o + 
SrMnAs2 crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two SrMnAs2 clusters. Sr(1) is bonded in a 2-coordinate geometry to one As(1) and one As(2) atom. The Sr(1)-As(1) bond length is 1.58 Å. The Sr(1)-As(2) bond length is 1.49 Å. Mn(1) is bonded in a distorted single-bond geometry to one As(2) atom. The Mn(1)-As(2) bond length is 2.93 Å. There are two inequivalent As sites. In the first As site, As(1) is bonded in a distorted single-bond geometry to one Sr(1) atom. In the second As site, As(2) is bonded in a single-bond geometry to one Sr(1) and one Mn(1) atom.