The crystal structure described by Na2CBiAsO7 crystallizes in the monoclinic P2_1/m space group. Na(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. Bi(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(5), one O(6), and two equivalent O(4) atoms. As(1) is bonded in a tetrahedral geometry to one O(5), one O(6), and two equivalent O(4) atoms. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Na(1) and one C(1) atom. In the second O site, O(2) is bonded to two equivalent Na(1), one C(1), and one Bi(1) atom to form distorted corner-sharing ONa2BiC trigonal pyramids. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Na(1), one C(1), and one Bi(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Na(1), one Bi(1), and one As(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Bi(1), and one As(1) atom. In the sixth O site, O(6) is bonded to two equivalent Na(1), one Bi(1), and one As(1) atom to form distorted corner-sharing ONa2BiAs tetrahedra. is represented by the CIF file [CIF]
data_Na2BiAsCO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.106
_cell_length_b   5.327
_cell_length_c   9.452
_cell_angle_alpha   88.437
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   357.666
_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
  Na  Na0  1  0.009  0.245  0.796  1.0
  Na  Na1  1  0.491  0.245  0.796  1.0
  Na  Na2  1  0.509  0.755  0.204  1.0
  Na  Na3  1  0.991  0.755  0.204  1.0
  Bi  Bi4  1  0.750  0.794  0.621  1.0
  Bi  Bi5  1  0.250  0.206  0.379  1.0
  As  As6  1  0.250  0.722  0.607  1.0
  As  As7  1  0.750  0.278  0.393  1.0
  C  C8  1  0.750  0.740  0.911  1.0
  C  C9  1  0.250  0.260  0.089  1.0
  O  O10  1  0.250  0.276  0.957  1.0
  O  O11  1  0.750  0.958  0.841  1.0
  O  O12  1  0.750  0.543  0.830  1.0
  O  O13  1  0.059  0.866  0.676  1.0
  O  O14  1  0.441  0.866  0.676  1.0
  O  O15  1  0.750  0.226  0.575  1.0
  O  O16  1  0.250  0.410  0.638  1.0
  O  O17  1  0.750  0.590  0.362  1.0
  O  O18  1  0.250  0.774  0.425  1.0
  O  O19  1  0.559  0.134  0.324  1.0
  O  O20  1  0.941  0.134  0.324  1.0
  O  O21  1  0.250  0.457  0.170  1.0
  O  O22  1  0.250  0.042  0.159  1.0
  O  O23  1  0.750  0.724  0.043  1.0
[/CIF]
.
The crystal structure described by Na2CBiAsO7 crystallizes in the monoclinic P2_1/m space group. Na(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. Bi(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(5), one O(6), and two equivalent O(4) atoms. As(1) is bonded in a tetrahedral geometry to one O(5), one O(6), and two equivalent O(4) atoms. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Na(1) and one C(1) atom. In the second O site, O(2) is bonded to two equivalent Na(1), one C(1), and one Bi(1) atom to form distorted corner-sharing ONa2BiC trigonal pyramids. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Na(1), one C(1), and one Bi(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Na(1), one Bi(1), and one As(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Bi(1), and one As(1) atom. In the sixth O site, O(6) is bonded to two equivalent Na(1), one Bi(1), and one As(1) atom to form distorted corner-sharing ONa2BiAs tetrahedra. is represented by the CIF file [CIF]
data_Na2BiAsCO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.106
_cell_length_b   5.327
_cell_length_c   9.452
_cell_angle_alpha   88.437
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   357.666
_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
  Na  Na0  1  0.009  0.245  0.796  1.0
  Na  Na1  1  0.491  0.245  0.796  1.0
  Na  Na2  1  0.509  0.755  0.204  1.0
  Na  Na3  1  0.991  0.755  0.204  1.0
  Bi  Bi4  1  0.750  0.794  0.621  1.0
  Bi  Bi5  1  0.250  0.206  0.379  1.0
  As  As6  1  0.250  0.722  0.607  1.0
  As  As7  1  0.750  0.278  0.393  1.0
  C  C8  1  0.750  0.740  0.911  1.0
  C  C9  1  0.250  0.260  0.089  1.0
  O  O10  1  0.250  0.276  0.957  1.0
  O  O11  1  0.750  0.958  0.841  1.0
  O  O12  1  0.750  0.543  0.830  1.0
  O  O13  1  0.059  0.866  0.676  1.0
  O  O14  1  0.441  0.866  0.676  1.0
  O  O15  1  0.750  0.226  0.575  1.0
  O  O16  1  0.250  0.410  0.638  1.0
  O  O17  1  0.750  0.590  0.362  1.0
  O  O18  1  0.250  0.774  0.425  1.0
  O  O19  1  0.559  0.134  0.324  1.0
  O  O20  1  0.941  0.134  0.324  1.0
  O  O21  1  0.250  0.457  0.170  1.0
  O  O22  1  0.250  0.042  0.159  1.0
  O  O23  1  0.750  0.724  0.043  1.0
[/CIF]
.