The material described by CoBiAsO5 crystallizes in the triclinic P-1 space group. Co(1) is bonded to one O(1), one O(2), one O(4), one O(5), and two equivalent O(3) atoms to form CoO6 octahedra that share  a cornercorner with one Bi(1)O5 square pyramid, corners with four equivalent As(1)O4 tetrahedra,  an edgeedge with one Co(1)O6 octahedra, and edges with three equivalent Bi(1)O5 square pyramids. Bi(1) is bonded to one O(2), one O(4), one O(5), and two equivalent O(3) atoms to form distorted BiO5 square pyramids that share  a cornercorner with one Co(1)O6 octahedra, corners with three equivalent As(1)O4 tetrahedra, edges with three equivalent Co(1)O6 octahedra, and  an edgeedge with one Bi(1)O5 square pyramid. The corner-sharing octahedral tilt angles are 39°. As(1) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form AsO4 tetrahedra that share corners with four equivalent Co(1)O6 octahedra and corners with three equivalent Bi(1)O5 square pyramids. The corner-sharing octahedral tilt angles range from 50-56°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Co(1) and one As(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Co(1), one Bi(1), and one As(1) atom. In the third O site, O(3) is bonded to two equivalent Co(1) and two equivalent Bi(1) atoms to form edge-sharing OCo2Bi2 tetrahedra. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Co(1), one Bi(1), and one As(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Co(1), one Bi(1), and one As(1) atom. is represented by the CIF file [CIF]
data_CoBiAsO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.378
_cell_length_b   6.892
_cell_length_c   6.960
_cell_angle_alpha   111.118
_cell_angle_beta   107.240
_cell_angle_gamma   96.370
_symmetry_Int_Tables_number   1
_cell_volume   222.858
_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
  As  As0  1  0.345  0.813  0.611  1.0
  As  As1  1  0.655  0.187  0.389  1.0
  Bi  Bi2  1  0.901  0.238  0.966  1.0
  Bi  Bi3  1  0.099  0.762  0.034  1.0
  Co  Co4  1  0.669  0.636  0.268  1.0
  Co  Co5  1  0.331  0.364  0.732  1.0
  O  O6  1  0.632  0.756  0.571  1.0
  O  O7  1  0.368  0.244  0.429  1.0
  O  O8  1  0.085  0.776  0.374  1.0
  O  O9  1  0.915  0.224  0.626  1.0
  O  O10  1  0.269  0.498  0.047  1.0
  O  O11  1  0.731  0.502  0.953  1.0
  O  O12  1  0.425  0.082  0.795  1.0
  O  O13  1  0.575  0.918  0.205  1.0
  O  O14  1  0.231  0.653  0.726  1.0
  O  O15  1  0.769  0.347  0.274  1.0
[/CIF]
.
The material described by CoBiAsO5 crystallizes in the triclinic P-1 space group. Co(1) is bonded to one O(1), one O(2), one O(4), one O(5), and two equivalent O(3) atoms to form CoO6 octahedra that share  a cornercorner with one Bi(1)O5 square pyramid, corners with four equivalent As(1)O4 tetrahedra,  an edgeedge with one Co(1)O6 octahedra, and edges with three equivalent Bi(1)O5 square pyramids. Bi(1) is bonded to one O(2), one O(4), one O(5), and two equivalent O(3) atoms to form distorted BiO5 square pyramids that share  a cornercorner with one Co(1)O6 octahedra, corners with three equivalent As(1)O4 tetrahedra, edges with three equivalent Co(1)O6 octahedra, and  an edgeedge with one Bi(1)O5 square pyramid. The corner-sharing octahedral tilt angles are 39°. As(1) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form AsO4 tetrahedra that share corners with four equivalent Co(1)O6 octahedra and corners with three equivalent Bi(1)O5 square pyramids. The corner-sharing octahedral tilt angles range from 50-56°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Co(1) and one As(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Co(1), one Bi(1), and one As(1) atom. In the third O site, O(3) is bonded to two equivalent Co(1) and two equivalent Bi(1) atoms to form edge-sharing OCo2Bi2 tetrahedra. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Co(1), one Bi(1), and one As(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Co(1), one Bi(1), and one As(1) atom. is represented by the CIF file [CIF]
data_CoBiAsO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.378
_cell_length_b   6.892
_cell_length_c   6.960
_cell_angle_alpha   111.118
_cell_angle_beta   107.240
_cell_angle_gamma   96.370
_symmetry_Int_Tables_number   1
_cell_volume   222.858
_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
  As  As0  1  0.345  0.813  0.611  1.0
  As  As1  1  0.655  0.187  0.389  1.0
  Bi  Bi2  1  0.901  0.238  0.966  1.0
  Bi  Bi3  1  0.099  0.762  0.034  1.0
  Co  Co4  1  0.669  0.636  0.268  1.0
  Co  Co5  1  0.331  0.364  0.732  1.0
  O  O6  1  0.632  0.756  0.571  1.0
  O  O7  1  0.368  0.244  0.429  1.0
  O  O8  1  0.085  0.776  0.374  1.0
  O  O9  1  0.915  0.224  0.626  1.0
  O  O10  1  0.269  0.498  0.047  1.0
  O  O11  1  0.731  0.502  0.953  1.0
  O  O12  1  0.425  0.082  0.795  1.0
  O  O13  1  0.575  0.918  0.205  1.0
  O  O14  1  0.231  0.653  0.726  1.0
  O  O15  1  0.769  0.347  0.274  1.0
[/CIF]
.