data_SrCoAs2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.87
_cell_length_b   4.87
_cell_length_c   4.87
_cell_angle_alpha   120.9
_cell_angle_beta   120.9
_cell_angle_gamma   88.44
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrCoAs2
_chemical_formula_sum   'Sr1 Co1 As2'
_cell_volume   80.66
_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  0.49  1.0
  Co  Co2  1  0.0  0.0  0.0  1.0
  As  As0  1  0.0  0.4  0.75  1.0
  As  As1  1  0.4  0.0  0.75  1.0

data_SrCoAs2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.8
_cell_length_b   6.8
_cell_length_c   4.87
_cell_angle_alpha   90.0
_cell_angle_beta   134.22
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SrCoAs2
_chemical_formula_sum   'Sr2 Co2 As4'
_cell_volume   161.32
_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  0.49  1.0
  Co  Co1  2  0.0  0.0  0.0  1.0
  As  As2  4  0.3  0.3  0.34  1.0

Sr Co As As
SrCoAs2 crystallizes in the monoclinic Cm space group. Sr(1) is bonded in a 2-coordinate geometry to two equivalent Co(1) and two equivalent As(1) atoms. There is one shorter (2.40 Å) and one longer (2.48 Å) Sr(1)-Co(1) bond length. Both Sr(1)-As(1) bond lengths are 1.70 Å. Co(1) is bonded in a 4-coordinate geometry to two equivalent Sr(1) and two equivalent As(1) atoms. Both Co(1)-As(1) bond lengths are 2.51 Å. As(1) is bonded in a distorted single-bond geometry to one Sr(1) and one Co(1) atom.