The material structure described by Na2CoP2O7 crystallizes in the triclinic P1 space group. There are eight inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted bent 150 degrees geometry to one P(2), one O(17), and one O(26) atom. In the second Na site, Na(2) is bonded in a 5-coordinate geometry to one O(14), one O(15), one O(26), one O(7), and one O(8) atom. In the third Na site, Na(3) is bonded in a 1-coordinate geometry to one P(2), one O(16), one O(20), and one O(9) atom. In the fourth Na site, Na(4) is bonded in a 3-coordinate geometry to one O(12), one O(22), and one O(3) atom. In the fifth Na site, Na(5) is bonded in a 7-coordinate geometry to one O(11), one O(2), one O(23), one O(24), one O(25), one O(3), and one O(7) atom. In the sixth Na site, Na(6) is bonded in a 1-coordinate geometry to one O(14), one O(15), and one O(5) atom. In the seventh Na site, Na(7) is bonded in a 5-coordinate geometry to one O(18), one O(2), one O(20), one O(4), and one O(9) atom. In the eighth Na site, Na(8) is bonded in a 2-coordinate geometry to one O(1) and one O(4) atom. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded in a 4-coordinate geometry to one O(13), one O(24), one O(25), and one O(28) atom. In the second Co site, Co(2) is bonded in a 4-coordinate geometry to one O(12), one O(21), one O(23), and one O(6) atom. In the third Co site, Co(3) is bonded in a 6-coordinate geometry to one O(11), one O(14), one O(17), one O(21), one O(4), and one O(5) atom. In the fourth Co site, Co(4) is bonded in a 3-coordinate geometry to one O(16), one O(20), and one O(26) atom. There are eight inequivalent P sites. In the first P site, P(1) is bonded in a 3-coordinate geometry to one O(4), one O(5), and one O(6) atom. In the second P site, P(2) is bonded in a 6-coordinate geometry to one Na(1), one Na(3), one O(10), one O(16), one O(26), and one O(28) atom. In the third P site, P(3) is bonded in a 4-coordinate geometry to one O(12), one O(2), one O(3), and one O(9) atom. In the fourth P site, P(4) is bonded in a 3-coordinate geometry to one O(14), one O(27), and one O(8) atom. In the fifth P site, P(5) is bonded in a 1-coordinate geometry to one O(11), one O(22), and one O(25) atom. In the sixth P site, P(6) is bonded in a 4-coordinate geometry to one O(15), one O(22), one O(24), and one O(7) atom. In the seventh P site, P(7) is bonded in a 3-coordinate geometry to one O(10), one O(18), and one O(20) atom. In the eighth P site, P(8) is bonded in a 1-coordinate geometry to one O(19), one O(23), and one O(3) atom. There are twenty-eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Na(8) atom. In the second O site, O(2) is bonded in a single-bond geometry to one Na(5), one Na(7), and one P(3) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Na(4), one Na(5), one P(3), and one P(8) atom. In the fourth O site, O(4) is bonded in a distorted tetrahedral geometry to one Na(7), one Na(8), one Co(3), and one P(1) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Na(6), one Co(3), and one P(1) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one Co(2) and one P(1) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Na(2), one Na(5), and one P(6) atom. In the eighth O site, O(8) is bonded in a distorted water-like geometry to one Na(2) and one P(4) atom. In the ninth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to one Na(3), one Na(7), and one P(3) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one P(2) and one P(7) atom. In the eleventh O site, O(11) is bonded in a single-bond geometry to one Na(5), one Co(3), and one P(5) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Na(4), one Co(2), and one P(3) atom. In the thirteenth O site, O(13) is bonded in a single-bond geometry to one Co(1) atom. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Na(2), one Na(6), one Co(3), and one P(4) atom. In the fifteenth O site, O(15) is bonded in a 3-coordinate geometry to one Na(2), one Na(6), and one P(6) atom. In the sixteenth O site, O(16) is bonded in a 3-coordinate geometry to one Na(3), one Co(4), and one P(2) atom. In the seventeenth O site, O(17) is bonded in a distorted single-bond geometry to one Na(1) and one Co(3) atom. In the eighteenth O site, O(18) is bonded in a distorted water-like geometry to one Na(7) and one P(7) atom. In the nineteenth O site, O(19) is bonded in a single-bond geometry to one P(8) atom. In the twentieth O site, O(20) is bonded in a 4-coordinate geometry to one Na(3), one Na(7), one Co(4), and one P(7) atom. In the twenty-first O site, O(21) is bonded in a single-bond geometry to one Co(2) and one Co(3) atom. In the twenty-second O site, O(22) is bonded in a 3-coordinate geometry to one Na(4), one P(5), and one P(6) atom. In the twenty-third O site, O(23) is bonded in a 3-coordinate geometry to one Na(5), one Co(2), and one P(8) atom. In the twenty-fourth O site, O(24) is bonded in a 1-coordinate geometry to one Na(5), one Co(1), and one P(6) atom. In the twenty-fifth O site, O(25) is bonded in a distorted bent 120 degrees geometry to one Na(5), one Co(1), and one P(5) atom. In the twenty-sixth O site, O(26) is bonded in a distorted see-saw-like geometry to one Na(1), one Na(2), one Co(4), and one P(2) atom. In the twenty-seventh O site, O(27) is bonded in a distorted single-bond geometry to one P(4) atom. In the twenty-eighth O site, O(28) is bonded in a 1-coordinate geometry to one Co(1) and one P(2) atom. is represented by the CIF card [CIF]
data_Na2CoP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.546
_cell_length_b   9.553
_cell_length_c   11.069
_cell_angle_alpha   115.321
_cell_angle_beta   85.925
_cell_angle_gamma   106.572
_symmetry_Int_Tables_number   1
_cell_volume   598.689
_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  0.220  0.039  0.110  1.0
  Na  Na1  1  0.397  0.527  0.350  1.0
  Na  Na2  1  0.965  0.291  0.522  1.0
  Na  Na3  1  0.156  0.434  0.054  1.0
  Na  Na4  1  0.606  0.540  0.966  1.0
  Na  Na5  1  0.032  0.706  0.478  1.0
  Na  Na6  1  0.611  0.473  0.651  1.0
  Na  Na7  1  0.826  0.951  0.903  1.0
  Co  Co8  1  0.719  0.886  0.219  1.0
  Co  Co9  1  0.280  0.112  0.776  1.0
  Co  Co10  1  0.357  0.765  0.734  1.0
  Co  Co11  1  0.637  0.234  0.260  1.0
  P  P12  1  0.880  0.861  0.684  1.0
  P  P13  1  0.117  0.135  0.310  1.0
  P  P14  1  0.078  0.387  0.791  1.0
  P  P15  1  0.577  0.840  0.457  1.0
  P  P16  1  0.293  0.769  0.037  1.0
  P  P17  1  0.921  0.608  0.208  1.0
  P  P18  1  0.421  0.158  0.539  1.0
  P  P19  1  0.701  0.225  0.959  1.0
  O  O20  1  0.773  0.068  0.033  1.0
  O  O21  1  0.278  0.507  0.814  1.0
  O  O22  1  0.916  0.369  0.902  1.0
  O  O23  1  0.692  0.762  0.776  1.0
  O  O24  1  0.032  0.761  0.695  1.0
  O  O25  1  0.984  0.018  0.700  1.0
  O  O26  1  0.717  0.488  0.191  1.0
  O  O27  1  0.642  0.707  0.437  1.0
  O  O28  1  0.964  0.444  0.653  1.0
  O  O29  1  0.217  0.083  0.463  1.0
  O  O30  1  0.379  0.712  0.951  1.0
  O  O31  1  0.114  0.219  0.841  1.0
  O  O32  1  0.556  0.976  0.316  1.0
  O  O33  1  0.386  0.776  0.542  1.0
  O  O34  1  0.041  0.554  0.344  1.0
  O  O35  1  0.965  0.240  0.288  1.0
  O  O36  1  0.222  0.925  0.961  1.0
  O  O37  1  0.361  0.293  0.559  1.0
  O  O38  1  0.612  0.272  0.050  1.0
  O  O39  1  0.611  0.219  0.453  1.0
  O  O40  1  0.437  0.020  0.678  1.0
  O  O41  1  0.076  0.626  0.095  1.0
  O  O42  1  0.562  0.232  0.832  1.0
  O  O43  1  0.886  0.777  0.157  1.0
  O  O44  1  0.433  0.765  0.164  1.0
  O  O45  1  0.305  0.234  0.217  1.0
  O  O46  1  0.776  0.921  0.531  1.0
  O  O47  1  0.016  0.977  0.297  1.0
[/CIF]
.
The material structure described by Na2CoP2O7 crystallizes in the triclinic P1 space group. There are eight inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted bent 150 degrees geometry to one P(2), one O(17), and one O(26) atom. In the second Na site, Na(2) is bonded in a 5-coordinate geometry to one O(14), one O(15), one O(26), one O(7), and one O(8) atom. In the third Na site, Na(3) is bonded in a 1-coordinate geometry to one P(2), one O(16), one O(20), and one O(9) atom. In the fourth Na site, Na(4) is bonded in a 3-coordinate geometry to one O(12), one O(22), and one O(3) atom. In the fifth Na site, Na(5) is bonded in a 7-coordinate geometry to one O(11), one O(2), one O(23), one O(24), one O(25), one O(3), and one O(7) atom. In the sixth Na site, Na(6) is bonded in a 1-coordinate geometry to one O(14), one O(15), and one O(5) atom. In the seventh Na site, Na(7) is bonded in a 5-coordinate geometry to one O(18), one O(2), one O(20), one O(4), and one O(9) atom. In the eighth Na site, Na(8) is bonded in a 2-coordinate geometry to one O(1) and one O(4) atom. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded in a 4-coordinate geometry to one O(13), one O(24), one O(25), and one O(28) atom. In the second Co site, Co(2) is bonded in a 4-coordinate geometry to one O(12), one O(21), one O(23), and one O(6) atom. In the third Co site, Co(3) is bonded in a 6-coordinate geometry to one O(11), one O(14), one O(17), one O(21), one O(4), and one O(5) atom. In the fourth Co site, Co(4) is bonded in a 3-coordinate geometry to one O(16), one O(20), and one O(26) atom. There are eight inequivalent P sites. In the first P site, P(1) is bonded in a 3-coordinate geometry to one O(4), one O(5), and one O(6) atom. In the second P site, P(2) is bonded in a 6-coordinate geometry to one Na(1), one Na(3), one O(10), one O(16), one O(26), and one O(28) atom. In the third P site, P(3) is bonded in a 4-coordinate geometry to one O(12), one O(2), one O(3), and one O(9) atom. In the fourth P site, P(4) is bonded in a 3-coordinate geometry to one O(14), one O(27), and one O(8) atom. In the fifth P site, P(5) is bonded in a 1-coordinate geometry to one O(11), one O(22), and one O(25) atom. In the sixth P site, P(6) is bonded in a 4-coordinate geometry to one O(15), one O(22), one O(24), and one O(7) atom. In the seventh P site, P(7) is bonded in a 3-coordinate geometry to one O(10), one O(18), and one O(20) atom. In the eighth P site, P(8) is bonded in a 1-coordinate geometry to one O(19), one O(23), and one O(3) atom. There are twenty-eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Na(8) atom. In the second O site, O(2) is bonded in a single-bond geometry to one Na(5), one Na(7), and one P(3) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Na(4), one Na(5), one P(3), and one P(8) atom. In the fourth O site, O(4) is bonded in a distorted tetrahedral geometry to one Na(7), one Na(8), one Co(3), and one P(1) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Na(6), one Co(3), and one P(1) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one Co(2) and one P(1) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Na(2), one Na(5), and one P(6) atom. In the eighth O site, O(8) is bonded in a distorted water-like geometry to one Na(2) and one P(4) atom. In the ninth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to one Na(3), one Na(7), and one P(3) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one P(2) and one P(7) atom. In the eleventh O site, O(11) is bonded in a single-bond geometry to one Na(5), one Co(3), and one P(5) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Na(4), one Co(2), and one P(3) atom. In the thirteenth O site, O(13) is bonded in a single-bond geometry to one Co(1) atom. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Na(2), one Na(6), one Co(3), and one P(4) atom. In the fifteenth O site, O(15) is bonded in a 3-coordinate geometry to one Na(2), one Na(6), and one P(6) atom. In the sixteenth O site, O(16) is bonded in a 3-coordinate geometry to one Na(3), one Co(4), and one P(2) atom. In the seventeenth O site, O(17) is bonded in a distorted single-bond geometry to one Na(1) and one Co(3) atom. In the eighteenth O site, O(18) is bonded in a distorted water-like geometry to one Na(7) and one P(7) atom. In the nineteenth O site, O(19) is bonded in a single-bond geometry to one P(8) atom. In the twentieth O site, O(20) is bonded in a 4-coordinate geometry to one Na(3), one Na(7), one Co(4), and one P(7) atom. In the twenty-first O site, O(21) is bonded in a single-bond geometry to one Co(2) and one Co(3) atom. In the twenty-second O site, O(22) is bonded in a 3-coordinate geometry to one Na(4), one P(5), and one P(6) atom. In the twenty-third O site, O(23) is bonded in a 3-coordinate geometry to one Na(5), one Co(2), and one P(8) atom. In the twenty-fourth O site, O(24) is bonded in a 1-coordinate geometry to one Na(5), one Co(1), and one P(6) atom. In the twenty-fifth O site, O(25) is bonded in a distorted bent 120 degrees geometry to one Na(5), one Co(1), and one P(5) atom. In the twenty-sixth O site, O(26) is bonded in a distorted see-saw-like geometry to one Na(1), one Na(2), one Co(4), and one P(2) atom. In the twenty-seventh O site, O(27) is bonded in a distorted single-bond geometry to one P(4) atom. In the twenty-eighth O site, O(28) is bonded in a 1-coordinate geometry to one Co(1) and one P(2) atom. is represented by the CIF card [CIF]
data_Na2CoP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.546
_cell_length_b   9.553
_cell_length_c   11.069
_cell_angle_alpha   115.321
_cell_angle_beta   85.925
_cell_angle_gamma   106.572
_symmetry_Int_Tables_number   1
_cell_volume   598.689
_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  0.220  0.039  0.110  1.0
  Na  Na1  1  0.397  0.527  0.350  1.0
  Na  Na2  1  0.965  0.291  0.522  1.0
  Na  Na3  1  0.156  0.434  0.054  1.0
  Na  Na4  1  0.606  0.540  0.966  1.0
  Na  Na5  1  0.032  0.706  0.478  1.0
  Na  Na6  1  0.611  0.473  0.651  1.0
  Na  Na7  1  0.826  0.951  0.903  1.0
  Co  Co8  1  0.719  0.886  0.219  1.0
  Co  Co9  1  0.280  0.112  0.776  1.0
  Co  Co10  1  0.357  0.765  0.734  1.0
  Co  Co11  1  0.637  0.234  0.260  1.0
  P  P12  1  0.880  0.861  0.684  1.0
  P  P13  1  0.117  0.135  0.310  1.0
  P  P14  1  0.078  0.387  0.791  1.0
  P  P15  1  0.577  0.840  0.457  1.0
  P  P16  1  0.293  0.769  0.037  1.0
  P  P17  1  0.921  0.608  0.208  1.0
  P  P18  1  0.421  0.158  0.539  1.0
  P  P19  1  0.701  0.225  0.959  1.0
  O  O20  1  0.773  0.068  0.033  1.0
  O  O21  1  0.278  0.507  0.814  1.0
  O  O22  1  0.916  0.369  0.902  1.0
  O  O23  1  0.692  0.762  0.776  1.0
  O  O24  1  0.032  0.761  0.695  1.0
  O  O25  1  0.984  0.018  0.700  1.0
  O  O26  1  0.717  0.488  0.191  1.0
  O  O27  1  0.642  0.707  0.437  1.0
  O  O28  1  0.964  0.444  0.653  1.0
  O  O29  1  0.217  0.083  0.463  1.0
  O  O30  1  0.379  0.712  0.951  1.0
  O  O31  1  0.114  0.219  0.841  1.0
  O  O32  1  0.556  0.976  0.316  1.0
  O  O33  1  0.386  0.776  0.542  1.0
  O  O34  1  0.041  0.554  0.344  1.0
  O  O35  1  0.965  0.240  0.288  1.0
  O  O36  1  0.222  0.925  0.961  1.0
  O  O37  1  0.361  0.293  0.559  1.0
  O  O38  1  0.612  0.272  0.050  1.0
  O  O39  1  0.611  0.219  0.453  1.0
  O  O40  1  0.437  0.020  0.678  1.0
  O  O41  1  0.076  0.626  0.095  1.0
  O  O42  1  0.562  0.232  0.832  1.0
  O  O43  1  0.886  0.777  0.157  1.0
  O  O44  1  0.433  0.765  0.164  1.0
  O  O45  1  0.305  0.234  0.217  1.0
  O  O46  1  0.776  0.921  0.531  1.0
  O  O47  1  0.016  0.977  0.297  1.0
[/CIF]
.