The compound described by Na2CoP2O7 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 9-coordinate geometry to one O(2), two equivalent O(1), two equivalent O(5), and four equivalent O(4) atoms. In the second Na site, Na(2) is bonded in a 7-coordinate geometry to one O(5), two equivalent O(2), and four equivalent O(1) atoms. Co(1) is bonded to one O(2), two equivalent O(1), and two equivalent O(4) atoms to form CoO5 trigonal bipyramids that share corners with two equivalent P(2)O4 tetrahedra and corners with three equivalent P(1)O4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form PO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra and corners with three equivalent Co(1)O5 trigonal bipyramids. In the second P site, P(2) is bonded to one O(3), one O(5), and two equivalent O(4) atoms to form PO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra and corners with two equivalent Co(1)O5 trigonal bipyramids. There are five inequivalent O sites. In the first O site, O(3) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. In the second O site, O(4) is bonded in a 2-coordinate geometry to two equivalent Na(1), one Co(1), and one P(2) atom. In the third O site, O(5) is bonded in a 4-coordinate geometry to one Na(2), two equivalent Na(1), and one P(2) atom. In the fourth O site, O(1) is bonded in a 5-coordinate geometry to one Na(1), two equivalent Na(2), one Co(1), and one P(1) atom. In the fifth O site, O(2) is bonded in a 5-coordinate geometry to one Na(1), two equivalent Na(2), one Co(1), and one P(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2CoP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.325
_cell_length_b   8.812
_cell_length_c   13.965
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   655.274
_cell_formula_units_Z   4
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  0.750  0.866  0.603  1.0
  Na  Na1  1  0.750  0.634  0.103  1.0
  Na  Na2  1  0.250  0.134  0.397  1.0
  Na  Na3  1  0.250  0.366  0.897  1.0
  Na  Na4  1  0.250  0.865  0.203  1.0
  Na  Na5  1  0.250  0.635  0.703  1.0
  Na  Na6  1  0.750  0.135  0.797  1.0
  Na  Na7  1  0.750  0.365  0.297  1.0
  Co  Co8  1  0.750  0.769  0.330  1.0
  Co  Co9  1  0.750  0.731  0.830  1.0
  Co  Co10  1  0.250  0.231  0.670  1.0
  Co  Co11  1  0.250  0.269  0.170  1.0
  P  P12  1  0.750  0.055  0.191  1.0
  P  P13  1  0.750  0.445  0.691  1.0
  P  P14  1  0.250  0.945  0.809  1.0
  P  P15  1  0.250  0.555  0.309  1.0
  P  P16  1  0.750  0.275  0.040  1.0
  P  P17  1  0.750  0.225  0.540  1.0
  P  P18  1  0.250  0.725  0.960  1.0
  P  P19  1  0.250  0.775  0.460  1.0
  O  O20  1  0.991  0.122  0.235  1.0
  O  O21  1  0.509  0.378  0.735  1.0
  O  O22  1  0.491  0.878  0.765  1.0
  O  O23  1  0.009  0.622  0.265  1.0
  O  O24  1  0.009  0.878  0.765  1.0
  O  O25  1  0.491  0.622  0.265  1.0
  O  O26  1  0.509  0.122  0.235  1.0
  O  O27  1  0.991  0.378  0.735  1.0
  O  O28  1  0.750  0.881  0.196  1.0
  O  O29  1  0.750  0.619  0.696  1.0
  O  O30  1  0.250  0.119  0.804  1.0
  O  O31  1  0.250  0.381  0.304  1.0
  O  O32  1  0.750  0.096  0.078  1.0
  O  O33  1  0.750  0.404  0.578  1.0
  O  O34  1  0.250  0.904  0.922  1.0
  O  O35  1  0.250  0.596  0.422  1.0
  O  O36  1  0.514  0.351  0.082  1.0
  O  O37  1  0.986  0.149  0.582  1.0
  O  O38  1  0.014  0.649  0.918  1.0
  O  O39  1  0.486  0.851  0.418  1.0
  O  O40  1  0.486  0.649  0.918  1.0
  O  O41  1  0.014  0.851  0.418  1.0
  O  O42  1  0.986  0.351  0.082  1.0
  O  O43  1  0.514  0.149  0.582  1.0
  O  O44  1  0.750  0.265  0.933  1.0
  O  O45  1  0.750  0.235  0.433  1.0
  O  O46  1  0.250  0.735  0.067  1.0
  O  O47  1  0.250  0.765  0.567  1.0
[/CIF]
.
The compound described by Na2CoP2O7 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 9-coordinate geometry to one O(2), two equivalent O(1), two equivalent O(5), and four equivalent O(4) atoms. In the second Na site, Na(2) is bonded in a 7-coordinate geometry to one O(5), two equivalent O(2), and four equivalent O(1) atoms. Co(1) is bonded to one O(2), two equivalent O(1), and two equivalent O(4) atoms to form CoO5 trigonal bipyramids that share corners with two equivalent P(2)O4 tetrahedra and corners with three equivalent P(1)O4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form PO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra and corners with three equivalent Co(1)O5 trigonal bipyramids. In the second P site, P(2) is bonded to one O(3), one O(5), and two equivalent O(4) atoms to form PO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra and corners with two equivalent Co(1)O5 trigonal bipyramids. There are five inequivalent O sites. In the first O site, O(3) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. In the second O site, O(4) is bonded in a 2-coordinate geometry to two equivalent Na(1), one Co(1), and one P(2) atom. In the third O site, O(5) is bonded in a 4-coordinate geometry to one Na(2), two equivalent Na(1), and one P(2) atom. In the fourth O site, O(1) is bonded in a 5-coordinate geometry to one Na(1), two equivalent Na(2), one Co(1), and one P(1) atom. In the fifth O site, O(2) is bonded in a 5-coordinate geometry to one Na(1), two equivalent Na(2), one Co(1), and one P(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2CoP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.325
_cell_length_b   8.812
_cell_length_c   13.965
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   655.274
_cell_formula_units_Z   4
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  0.750  0.866  0.603  1.0
  Na  Na1  1  0.750  0.634  0.103  1.0
  Na  Na2  1  0.250  0.134  0.397  1.0
  Na  Na3  1  0.250  0.366  0.897  1.0
  Na  Na4  1  0.250  0.865  0.203  1.0
  Na  Na5  1  0.250  0.635  0.703  1.0
  Na  Na6  1  0.750  0.135  0.797  1.0
  Na  Na7  1  0.750  0.365  0.297  1.0
  Co  Co8  1  0.750  0.769  0.330  1.0
  Co  Co9  1  0.750  0.731  0.830  1.0
  Co  Co10  1  0.250  0.231  0.670  1.0
  Co  Co11  1  0.250  0.269  0.170  1.0
  P  P12  1  0.750  0.055  0.191  1.0
  P  P13  1  0.750  0.445  0.691  1.0
  P  P14  1  0.250  0.945  0.809  1.0
  P  P15  1  0.250  0.555  0.309  1.0
  P  P16  1  0.750  0.275  0.040  1.0
  P  P17  1  0.750  0.225  0.540  1.0
  P  P18  1  0.250  0.725  0.960  1.0
  P  P19  1  0.250  0.775  0.460  1.0
  O  O20  1  0.991  0.122  0.235  1.0
  O  O21  1  0.509  0.378  0.735  1.0
  O  O22  1  0.491  0.878  0.765  1.0
  O  O23  1  0.009  0.622  0.265  1.0
  O  O24  1  0.009  0.878  0.765  1.0
  O  O25  1  0.491  0.622  0.265  1.0
  O  O26  1  0.509  0.122  0.235  1.0
  O  O27  1  0.991  0.378  0.735  1.0
  O  O28  1  0.750  0.881  0.196  1.0
  O  O29  1  0.750  0.619  0.696  1.0
  O  O30  1  0.250  0.119  0.804  1.0
  O  O31  1  0.250  0.381  0.304  1.0
  O  O32  1  0.750  0.096  0.078  1.0
  O  O33  1  0.750  0.404  0.578  1.0
  O  O34  1  0.250  0.904  0.922  1.0
  O  O35  1  0.250  0.596  0.422  1.0
  O  O36  1  0.514  0.351  0.082  1.0
  O  O37  1  0.986  0.149  0.582  1.0
  O  O38  1  0.014  0.649  0.918  1.0
  O  O39  1  0.486  0.851  0.418  1.0
  O  O40  1  0.486  0.649  0.918  1.0
  O  O41  1  0.014  0.851  0.418  1.0
  O  O42  1  0.986  0.351  0.082  1.0
  O  O43  1  0.514  0.149  0.582  1.0
  O  O44  1  0.750  0.265  0.933  1.0
  O  O45  1  0.750  0.235  0.433  1.0
  O  O46  1  0.250  0.735  0.067  1.0
  O  O47  1  0.250  0.765  0.567  1.0
[/CIF]
.