The compound described by Sr(Cu2As)2 crystallizes in the trigonal R-3m space group. Sr(1) is bonded to six equivalent As(1) atoms to form distorted edge-sharing SrAs6 octahedra. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 3-coordinate geometry to three equivalent As(1) atoms. In the second Cu site, Cu(2) is bonded in a distorted single-bond geometry to four equivalent As(1) atoms. As(1) is bonded in a 10-coordinate geometry to three equivalent Sr(1), three equivalent Cu(1), and four equivalent Cu(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr(Cu2As)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.238
_cell_length_b   8.238
_cell_length_c   8.238
_cell_angle_alpha   29.229
_cell_angle_beta   29.229
_cell_angle_gamma   29.229
_symmetry_Int_Tables_number   1
_cell_volume   117.922
_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  0.000  0.000  0.000  1.0
  Cu  Cu1  1  0.441  0.441  0.441  1.0
  Cu  Cu2  1  0.145  0.145  0.145  1.0
  Cu  Cu3  1  0.559  0.559  0.559  1.0
  Cu  Cu4  1  0.855  0.855  0.855  1.0
  As  As5  1  0.248  0.248  0.248  1.0
  As  As6  1  0.752  0.752  0.752  1.0
[/CIF]
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The compound described by Sr(Cu2As)2 crystallizes in the trigonal R-3m space group. Sr(1) is bonded to six equivalent As(1) atoms to form distorted edge-sharing SrAs6 octahedra. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 3-coordinate geometry to three equivalent As(1) atoms. In the second Cu site, Cu(2) is bonded in a distorted single-bond geometry to four equivalent As(1) atoms. As(1) is bonded in a 10-coordinate geometry to three equivalent Sr(1), three equivalent Cu(1), and four equivalent Cu(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr(Cu2As)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.238
_cell_length_b   8.238
_cell_length_c   8.238
_cell_angle_alpha   29.229
_cell_angle_beta   29.229
_cell_angle_gamma   29.229
_symmetry_Int_Tables_number   1
_cell_volume   117.922
_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  0.000  0.000  0.000  1.0
  Cu  Cu1  1  0.441  0.441  0.441  1.0
  Cu  Cu2  1  0.145  0.145  0.145  1.0
  Cu  Cu3  1  0.559  0.559  0.559  1.0
  Cu  Cu4  1  0.855  0.855  0.855  1.0
  As  As5  1  0.248  0.248  0.248  1.0
  As  As6  1  0.752  0.752  0.752  1.0
[/CIF]
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