The crystal structure described by SrCo2(AsO4)2 crystallizes in the triclinic P-1 space group. Sr(1) is bonded in a 8-coordinate geometry to one As(2), one O(2), one O(4), one O(5), two equivalent O(3), and two equivalent O(8) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(2), one O(4), and one O(6) atom to form distorted CoO4 tetrahedra that share corners with three equivalent Co(2)O6 octahedra and corners with two equivalent As(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 44-72°. In the second Co site, Co(2) is bonded to one O(1), one O(4), one O(5), one O(6), and two equivalent O(7) atoms to form distorted CoO6 octahedra that share corners with two equivalent As(1)O4 tetrahedra, corners with three equivalent Co(1)O4 tetrahedra, and  an edgeedge with one Co(2)O6 octahedra. There are two inequivalent As sites. In the first As site, As(1) is bonded to one O(2), one O(3), one O(5), and one O(6) atom to form AsO4 tetrahedra that share corners with two equivalent Co(2)O6 octahedra and corners with two equivalent Co(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 55°. In the second As site, As(2) is bonded in a 3-coordinate geometry to one Sr(1), one O(4), one O(7), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Co(1) and one Co(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Sr(1), one Co(1), and one As(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Sr(1) and one As(1) atom. In the fourth O site, O(4) is bonded in a distorted tetrahedral geometry to one Sr(1), one Co(1), one Co(2), and one As(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one Co(2), and one As(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Co(1), one Co(2), and one As(1) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to two equivalent Co(2) and one As(2) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to two equivalent Sr(1) and one As(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_SrCo2(AsO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.569
_cell_length_b   7.281
_cell_length_c   9.709
_cell_angle_alpha   109.434
_cell_angle_beta   99.157
_cell_angle_gamma   96.200
_symmetry_Int_Tables_number   1
_cell_volume   360.965
_cell_formula_units_Z   2
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  0.671  0.780  0.525  1.0
  Sr  Sr1  1  0.329  0.220  0.475  1.0
  Co  Co2  1  0.528  0.645  0.879  1.0
  Co  Co3  1  0.135  0.876  0.063  1.0
  Co  Co4  1  0.472  0.355  0.121  1.0
  Co  Co5  1  0.865  0.124  0.937  1.0
  As  As6  1  0.929  0.417  0.750  1.0
  As  As7  1  0.071  0.583  0.250  1.0
  As  As8  1  0.229  0.870  0.716  1.0
  As  As9  1  0.771  0.130  0.284  1.0
  O  O10  1  0.613  0.263  0.972  1.0
  O  O11  1  0.772  0.537  0.275  1.0
  O  O12  1  0.730  0.433  0.603  1.0
  O  O13  1  0.538  0.835  0.779  1.0
  O  O14  1  0.122  0.818  0.242  1.0
  O  O15  1  0.387  0.737  0.028  1.0
  O  O16  1  0.462  0.165  0.221  1.0
  O  O17  1  0.270  0.567  0.397  1.0
  O  O18  1  0.137  0.406  0.095  1.0
  O  O19  1  0.854  0.001  0.084  1.0
  O  O20  1  0.146  0.999  0.916  1.0
  O  O21  1  0.878  0.182  0.758  1.0
  O  O22  1  0.318  0.022  0.624  1.0
  O  O23  1  0.682  0.978  0.376  1.0
  O  O24  1  0.863  0.594  0.905  1.0
  O  O25  1  0.228  0.463  0.725  1.0
[/CIF]
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The crystal structure described by SrCo2(AsO4)2 crystallizes in the triclinic P-1 space group. Sr(1) is bonded in a 8-coordinate geometry to one As(2), one O(2), one O(4), one O(5), two equivalent O(3), and two equivalent O(8) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(2), one O(4), and one O(6) atom to form distorted CoO4 tetrahedra that share corners with three equivalent Co(2)O6 octahedra and corners with two equivalent As(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 44-72°. In the second Co site, Co(2) is bonded to one O(1), one O(4), one O(5), one O(6), and two equivalent O(7) atoms to form distorted CoO6 octahedra that share corners with two equivalent As(1)O4 tetrahedra, corners with three equivalent Co(1)O4 tetrahedra, and  an edgeedge with one Co(2)O6 octahedra. There are two inequivalent As sites. In the first As site, As(1) is bonded to one O(2), one O(3), one O(5), and one O(6) atom to form AsO4 tetrahedra that share corners with two equivalent Co(2)O6 octahedra and corners with two equivalent Co(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 55°. In the second As site, As(2) is bonded in a 3-coordinate geometry to one Sr(1), one O(4), one O(7), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Co(1) and one Co(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Sr(1), one Co(1), and one As(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Sr(1) and one As(1) atom. In the fourth O site, O(4) is bonded in a distorted tetrahedral geometry to one Sr(1), one Co(1), one Co(2), and one As(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one Co(2), and one As(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Co(1), one Co(2), and one As(1) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to two equivalent Co(2) and one As(2) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to two equivalent Sr(1) and one As(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_SrCo2(AsO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.569
_cell_length_b   7.281
_cell_length_c   9.709
_cell_angle_alpha   109.434
_cell_angle_beta   99.157
_cell_angle_gamma   96.200
_symmetry_Int_Tables_number   1
_cell_volume   360.965
_cell_formula_units_Z   2
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  0.671  0.780  0.525  1.0
  Sr  Sr1  1  0.329  0.220  0.475  1.0
  Co  Co2  1  0.528  0.645  0.879  1.0
  Co  Co3  1  0.135  0.876  0.063  1.0
  Co  Co4  1  0.472  0.355  0.121  1.0
  Co  Co5  1  0.865  0.124  0.937  1.0
  As  As6  1  0.929  0.417  0.750  1.0
  As  As7  1  0.071  0.583  0.250  1.0
  As  As8  1  0.229  0.870  0.716  1.0
  As  As9  1  0.771  0.130  0.284  1.0
  O  O10  1  0.613  0.263  0.972  1.0
  O  O11  1  0.772  0.537  0.275  1.0
  O  O12  1  0.730  0.433  0.603  1.0
  O  O13  1  0.538  0.835  0.779  1.0
  O  O14  1  0.122  0.818  0.242  1.0
  O  O15  1  0.387  0.737  0.028  1.0
  O  O16  1  0.462  0.165  0.221  1.0
  O  O17  1  0.270  0.567  0.397  1.0
  O  O18  1  0.137  0.406  0.095  1.0
  O  O19  1  0.854  0.001  0.084  1.0
  O  O20  1  0.146  0.999  0.916  1.0
  O  O21  1  0.878  0.182  0.758  1.0
  O  O22  1  0.318  0.022  0.624  1.0
  O  O23  1  0.682  0.978  0.376  1.0
  O  O24  1  0.863  0.594  0.905  1.0
  O  O25  1  0.228  0.463  0.725  1.0
[/CIF]
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