The crystal structure described by NaW7P2O25 crystallizes in the triclinic P1 space group. Na(1) is bonded in a 8-coordinate geometry to one O(1), one O(21), one O(24), one O(5), one O(8), one O(9), and two equivalent O(7) atoms. There are seven inequivalent W sites. In the first W site, W(1) is bonded to one O(11), one O(13), one O(17), one O(19), one O(25), and one O(3) atom to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 3-24°. In the second W site, W(2) is bonded to one O(12), one O(14), one O(18), one O(20), one O(25), and one O(4) atom to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 3-18°. In the third W site, W(3) is bonded to one O(13), one O(14), one O(15), one O(16), one O(3), and one O(4) atom to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 1-20°. In the fourth W site, W(4) is bonded to one O(1), one O(11), one O(15), one O(17), one O(5), and one O(9) atom to form WO6 octahedra that share  a cornercorner with one W(3)O6 octahedra, corners with two equivalent W(1)O6 octahedra, corners with two equivalent W(6)O6 octahedra, and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 8-25°. In the fifth W site, W(5) is bonded to one O(10), one O(12), one O(16), one O(18), one O(2), and one O(6) atom to form WO6 octahedra that share  a cornercorner with one W(3)O6 octahedra, corners with two equivalent W(2)O6 octahedra, corners with two equivalent W(7)O6 octahedra, and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 1-21°. In the sixth W site, W(6) is bonded to one O(19), one O(22), one O(24), one O(5), one O(7), and one O(9) atom to form WO6 octahedra that share  a cornercorner with one W(1)O6 octahedra, corners with two equivalent W(4)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 4-25°. In the seventh W site, W(7) is bonded to one O(10), one O(20), one O(21), one O(23), one O(6), and one O(8) atom to form WO6 octahedra that share  a cornercorner with one W(2)O6 octahedra, corners with two equivalent W(5)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 4-21°. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(2), one O(21), one O(23), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one W(5)O6 octahedra,  a cornercorner with one W(6)O6 octahedra, and corners with two equivalent W(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 14-42°. In the second P site, P(2) is bonded to one O(1), one O(22), one O(24), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one W(4)O6 octahedra,  a cornercorner with one W(7)O6 octahedra, and corners with two equivalent W(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 14-43°. There are twenty-five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one W(4), and one P(2) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one W(5) and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one W(1) and one W(3) atom. In the fourth O site, O(4) is bonded in a linear geometry to one W(2) and one W(3) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one Na(1), one W(4), and one W(6) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one W(5) and one W(7) atom. In the seventh O site, O(7) is bonded in a 1-coordinate geometry to two equivalent Na(1), one W(6), and one P(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Na(1), one W(7), and one P(2) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Na(1), one W(4), and one W(6) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one W(5) and one W(7) atom. In the eleventh O site, O(11) is bonded in a linear geometry to one W(1) and one W(4) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one W(2) and one W(5) atom. In the thirteenth O site, O(13) is bonded in a linear geometry to one W(1) and one W(3) atom. In the fourteenth O site, O(14) is bonded in a linear geometry to one W(2) and one W(3) atom. In the fifteenth O site, O(15) is bonded in a linear geometry to one W(3) and one W(4) atom. In the sixteenth O site, O(16) is bonded in a linear geometry to one W(3) and one W(5) atom. In the seventeenth O site, O(17) is bonded in a bent 150 degrees geometry to one W(1) and one W(4) atom. In the eighteenth O site, O(18) is bonded in a linear geometry to one W(2) and one W(5) atom. In the nineteenth O site, O(19) is bonded in a linear geometry to one W(1) and one W(6) atom. In the twentieth O site, O(20) is bonded in a linear geometry to one W(2) and one W(7) atom. In the twenty-first O site, O(21) is bonded in a 3-coordinate geometry to one Na(1), one W(7), and one P(1) atom. In the twenty-second O site, O(22) is bonded in a bent 150 degrees geometry to one W(6) and one P(2) atom. In the twenty-third O site, O(23) is bonded in a distorted linear geometry to one W(7) and one P(1) atom. In the twenty-fourth O site, O(24) is bonded in a 2-coordinate geometry to one Na(1), one W(6), and one P(2) atom. In the twenty-fifth O site, O(25) is bonded in a linear geometry to one W(1) and one W(2) atom. is represented by the CIF file [CIF]
data_NaP2W7O25
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.396
_cell_length_b   6.729
_cell_length_c   14.054
_cell_angle_alpha   95.899
_cell_angle_beta   100.792
_cell_angle_gamma   90.119
_symmetry_Int_Tables_number   1
_cell_volume   498.530
_cell_formula_units_Z   1
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  0.253  0.336  0.474  1.0
  P  P1  1  0.815  0.204  0.585  1.0
  P  P2  1  0.187  0.795  0.418  1.0
  W  W3  1  0.558  0.700  0.110  1.0
  W  W4  1  0.443  0.313  0.887  1.0
  W  W5  1  0.999  0.001  0.996  1.0
  W  W6  1  0.104  0.394  0.224  1.0
  W  W7  1  0.888  0.614  0.769  1.0
  W  W8  1  0.664  0.082  0.339  1.0
  W  W9  1  0.338  0.921  0.661  1.0
  O  O10  1  0.180  0.589  0.357  1.0
  O  O11  1  0.823  0.407  0.645  1.0
  O  O12  1  0.816  0.821  0.068  1.0
  O  O13  1  0.188  0.178  0.931  1.0
  O  O14  1  0.422  0.266  0.296  1.0
  O  O15  1  0.579  0.723  0.710  1.0
  O  O16  1  0.723  0.244  0.475  1.0
  O  O17  1  0.268  0.754  0.525  1.0
  O  O18  1  0.931  0.225  0.310  1.0
  O  O19  1  0.070  0.768  0.696  1.0
  O  O20  1  0.300  0.564  0.171  1.0
  O  O21  1  0.705  0.430  0.831  1.0
  O  O22  1  0.297  0.867  0.046  1.0
  O  O23  1  0.694  0.131  0.951  1.0
  O  O24  1  0.063  0.196  0.123  1.0
  O  O25  1  0.939  0.801  0.877  1.0
  O  O26  1  0.805  0.519  0.189  1.0
  O  O27  1  0.195  0.469  0.813  1.0
  O  O28  1  0.603  0.905  0.231  1.0
  O  O29  1  0.396  0.102  0.771  1.0
  O  O30  1  0.085  0.123  0.591  1.0
  O  O31  1  0.922  0.889  0.403  1.0
  O  O32  1  0.624  0.059  0.609  1.0
  O  O33  1  0.378  0.944  0.392  1.0
  O  O34  1  0.499  0.497  0.998  1.0
[/CIF]
.
The crystal structure described by NaW7P2O25 crystallizes in the triclinic P1 space group. Na(1) is bonded in a 8-coordinate geometry to one O(1), one O(21), one O(24), one O(5), one O(8), one O(9), and two equivalent O(7) atoms. There are seven inequivalent W sites. In the first W site, W(1) is bonded to one O(11), one O(13), one O(17), one O(19), one O(25), and one O(3) atom to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 3-24°. In the second W site, W(2) is bonded to one O(12), one O(14), one O(18), one O(20), one O(25), and one O(4) atom to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 3-18°. In the third W site, W(3) is bonded to one O(13), one O(14), one O(15), one O(16), one O(3), and one O(4) atom to form corner-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 1-20°. In the fourth W site, W(4) is bonded to one O(1), one O(11), one O(15), one O(17), one O(5), and one O(9) atom to form WO6 octahedra that share  a cornercorner with one W(3)O6 octahedra, corners with two equivalent W(1)O6 octahedra, corners with two equivalent W(6)O6 octahedra, and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 8-25°. In the fifth W site, W(5) is bonded to one O(10), one O(12), one O(16), one O(18), one O(2), and one O(6) atom to form WO6 octahedra that share  a cornercorner with one W(3)O6 octahedra, corners with two equivalent W(2)O6 octahedra, corners with two equivalent W(7)O6 octahedra, and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 1-21°. In the sixth W site, W(6) is bonded to one O(19), one O(22), one O(24), one O(5), one O(7), and one O(9) atom to form WO6 octahedra that share  a cornercorner with one W(1)O6 octahedra, corners with two equivalent W(4)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 4-25°. In the seventh W site, W(7) is bonded to one O(10), one O(20), one O(21), one O(23), one O(6), and one O(8) atom to form WO6 octahedra that share  a cornercorner with one W(2)O6 octahedra, corners with two equivalent W(5)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 4-21°. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(2), one O(21), one O(23), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one W(5)O6 octahedra,  a cornercorner with one W(6)O6 octahedra, and corners with two equivalent W(7)O6 octahedra. The corner-sharing octahedral tilt angles range from 14-42°. In the second P site, P(2) is bonded to one O(1), one O(22), one O(24), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one W(4)O6 octahedra,  a cornercorner with one W(7)O6 octahedra, and corners with two equivalent W(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 14-43°. There are twenty-five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one W(4), and one P(2) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one W(5) and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one W(1) and one W(3) atom. In the fourth O site, O(4) is bonded in a linear geometry to one W(2) and one W(3) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one Na(1), one W(4), and one W(6) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one W(5) and one W(7) atom. In the seventh O site, O(7) is bonded in a 1-coordinate geometry to two equivalent Na(1), one W(6), and one P(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Na(1), one W(7), and one P(2) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Na(1), one W(4), and one W(6) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one W(5) and one W(7) atom. In the eleventh O site, O(11) is bonded in a linear geometry to one W(1) and one W(4) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one W(2) and one W(5) atom. In the thirteenth O site, O(13) is bonded in a linear geometry to one W(1) and one W(3) atom. In the fourteenth O site, O(14) is bonded in a linear geometry to one W(2) and one W(3) atom. In the fifteenth O site, O(15) is bonded in a linear geometry to one W(3) and one W(4) atom. In the sixteenth O site, O(16) is bonded in a linear geometry to one W(3) and one W(5) atom. In the seventeenth O site, O(17) is bonded in a bent 150 degrees geometry to one W(1) and one W(4) atom. In the eighteenth O site, O(18) is bonded in a linear geometry to one W(2) and one W(5) atom. In the nineteenth O site, O(19) is bonded in a linear geometry to one W(1) and one W(6) atom. In the twentieth O site, O(20) is bonded in a linear geometry to one W(2) and one W(7) atom. In the twenty-first O site, O(21) is bonded in a 3-coordinate geometry to one Na(1), one W(7), and one P(1) atom. In the twenty-second O site, O(22) is bonded in a bent 150 degrees geometry to one W(6) and one P(2) atom. In the twenty-third O site, O(23) is bonded in a distorted linear geometry to one W(7) and one P(1) atom. In the twenty-fourth O site, O(24) is bonded in a 2-coordinate geometry to one Na(1), one W(6), and one P(2) atom. In the twenty-fifth O site, O(25) is bonded in a linear geometry to one W(1) and one W(2) atom. is represented by the CIF file [CIF]
data_NaP2W7O25
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.396
_cell_length_b   6.729
_cell_length_c   14.054
_cell_angle_alpha   95.899
_cell_angle_beta   100.792
_cell_angle_gamma   90.119
_symmetry_Int_Tables_number   1
_cell_volume   498.530
_cell_formula_units_Z   1
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  0.253  0.336  0.474  1.0
  P  P1  1  0.815  0.204  0.585  1.0
  P  P2  1  0.187  0.795  0.418  1.0
  W  W3  1  0.558  0.700  0.110  1.0
  W  W4  1  0.443  0.313  0.887  1.0
  W  W5  1  0.999  0.001  0.996  1.0
  W  W6  1  0.104  0.394  0.224  1.0
  W  W7  1  0.888  0.614  0.769  1.0
  W  W8  1  0.664  0.082  0.339  1.0
  W  W9  1  0.338  0.921  0.661  1.0
  O  O10  1  0.180  0.589  0.357  1.0
  O  O11  1  0.823  0.407  0.645  1.0
  O  O12  1  0.816  0.821  0.068  1.0
  O  O13  1  0.188  0.178  0.931  1.0
  O  O14  1  0.422  0.266  0.296  1.0
  O  O15  1  0.579  0.723  0.710  1.0
  O  O16  1  0.723  0.244  0.475  1.0
  O  O17  1  0.268  0.754  0.525  1.0
  O  O18  1  0.931  0.225  0.310  1.0
  O  O19  1  0.070  0.768  0.696  1.0
  O  O20  1  0.300  0.564  0.171  1.0
  O  O21  1  0.705  0.430  0.831  1.0
  O  O22  1  0.297  0.867  0.046  1.0
  O  O23  1  0.694  0.131  0.951  1.0
  O  O24  1  0.063  0.196  0.123  1.0
  O  O25  1  0.939  0.801  0.877  1.0
  O  O26  1  0.805  0.519  0.189  1.0
  O  O27  1  0.195  0.469  0.813  1.0
  O  O28  1  0.603  0.905  0.231  1.0
  O  O29  1  0.396  0.102  0.771  1.0
  O  O30  1  0.085  0.123  0.591  1.0
  O  O31  1  0.922  0.889  0.403  1.0
  O  O32  1  0.624  0.059  0.609  1.0
  O  O33  1  0.378  0.944  0.392  1.0
  O  O34  1  0.499  0.497  0.998  1.0
[/CIF]
.