The crystal structure described by AgFeP2O7 crystallizes in the monoclinic P2_1/c space group. Fe(1) is bonded to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(7) atom to form FeO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra and corners with three equivalent P(2)O4 tetrahedra. Ag(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. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share corners with three equivalent Fe(1)O6 octahedra and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 33-51°. In the second P site, P(2) is bonded to one O(3), one O(5), one O(6), and one O(7) atom to form PO4 tetrahedra that share corners with three equivalent Fe(1)O6 octahedra and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 19-48°. There are seven inequivalent O sites. In the first O site, O(5) is bonded in a 3-coordinate geometry to one Fe(1), one Ag(1), and one P(2) atom. In the second O site, O(6) is bonded in a 2-coordinate geometry to one Fe(1), one Ag(1), and one P(2) atom. In the third O site, O(7) is bonded in a bent 150 degrees geometry to one Fe(1) and one P(2) atom. In the fourth O site, O(1) is bonded in a 3-coordinate geometry to one Fe(1), one Ag(1), and one P(1) atom. In the fifth O site, O(2) is bonded in a 2-coordinate geometry to one Fe(1), one Ag(1), and one P(1) atom. In the sixth O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Ag(1), one P(1), and one P(2) atom. In the seventh O site, O(4) is bonded in a 3-coordinate geometry to one Fe(1), one Ag(1), and one P(1) atom. is represented by the CIF card [CIF]
data_FeAgP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.107
_cell_length_b   7.443
_cell_length_c   9.715
_cell_angle_alpha   68.271
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   544.559
_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
  Fe  Fe0  1  0.991  0.760  0.749  1.0
  Fe  Fe1  1  0.491  0.240  0.751  1.0
  Fe  Fe2  1  0.009  0.240  0.251  1.0
  Fe  Fe3  1  0.509  0.760  0.249  1.0
  Ag  Ag4  1  0.026  0.206  0.810  1.0
  Ag  Ag5  1  0.526  0.794  0.690  1.0
  Ag  Ag6  1  0.974  0.794  0.190  1.0
  Ag  Ag7  1  0.474  0.206  0.310  1.0
  P  P8  1  0.291  0.826  0.954  1.0
  P  P9  1  0.791  0.174  0.546  1.0
  P  P10  1  0.709  0.174  0.046  1.0
  P  P11  1  0.209  0.826  0.454  1.0
  P  P12  1  0.246  0.425  0.956  1.0
  P  P13  1  0.746  0.575  0.544  1.0
  P  P14  1  0.754  0.575  0.044  1.0
  P  P15  1  0.254  0.425  0.456  1.0
  O  O16  1  0.414  0.965  0.848  1.0
  O  O17  1  0.914  0.035  0.652  1.0
  O  O18  1  0.586  0.035  0.152  1.0
  O  O19  1  0.086  0.965  0.348  1.0
  O  O20  1  0.303  0.813  0.114  1.0
  O  O21  1  0.803  0.187  0.386  1.0
  O  O22  1  0.697  0.187  0.886  1.0
  O  O23  1  0.197  0.813  0.614  1.0
  O  O24  1  0.346  0.619  0.946  1.0
  O  O25  1  0.846  0.381  0.554  1.0
  O  O26  1  0.654  0.381  0.054  1.0
  O  O27  1  0.154  0.619  0.446  1.0
  O  O28  1  0.111  0.860  0.898  1.0
  O  O29  1  0.611  0.140  0.602  1.0
  O  O30  1  0.889  0.140  0.102  1.0
  O  O31  1  0.389  0.860  0.398  1.0
  O  O32  1  0.089  0.492  0.861  1.0
  O  O33  1  0.589  0.508  0.639  1.0
  O  O34  1  0.911  0.508  0.139  1.0
  O  O35  1  0.411  0.492  0.361  1.0
  O  O36  1  0.209  0.309  0.119  1.0
  O  O37  1  0.709  0.691  0.381  1.0
  O  O38  1  0.791  0.691  0.881  1.0
  O  O39  1  0.291  0.309  0.619  1.0
  O  O40  1  0.365  0.319  0.893  1.0
  O  O41  1  0.865  0.681  0.607  1.0
  O  O42  1  0.635  0.681  0.107  1.0
  O  O43  1  0.135  0.319  0.393  1.0
[/CIF]
.
The crystal structure described by AgFeP2O7 crystallizes in the monoclinic P2_1/c space group. Fe(1) is bonded to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(7) atom to form FeO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra and corners with three equivalent P(2)O4 tetrahedra. Ag(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. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share corners with three equivalent Fe(1)O6 octahedra and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 33-51°. In the second P site, P(2) is bonded to one O(3), one O(5), one O(6), and one O(7) atom to form PO4 tetrahedra that share corners with three equivalent Fe(1)O6 octahedra and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 19-48°. There are seven inequivalent O sites. In the first O site, O(5) is bonded in a 3-coordinate geometry to one Fe(1), one Ag(1), and one P(2) atom. In the second O site, O(6) is bonded in a 2-coordinate geometry to one Fe(1), one Ag(1), and one P(2) atom. In the third O site, O(7) is bonded in a bent 150 degrees geometry to one Fe(1) and one P(2) atom. In the fourth O site, O(1) is bonded in a 3-coordinate geometry to one Fe(1), one Ag(1), and one P(1) atom. In the fifth O site, O(2) is bonded in a 2-coordinate geometry to one Fe(1), one Ag(1), and one P(1) atom. In the sixth O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Ag(1), one P(1), and one P(2) atom. In the seventh O site, O(4) is bonded in a 3-coordinate geometry to one Fe(1), one Ag(1), and one P(1) atom. is represented by the CIF card [CIF]
data_FeAgP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.107
_cell_length_b   7.443
_cell_length_c   9.715
_cell_angle_alpha   68.271
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   544.559
_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
  Fe  Fe0  1  0.991  0.760  0.749  1.0
  Fe  Fe1  1  0.491  0.240  0.751  1.0
  Fe  Fe2  1  0.009  0.240  0.251  1.0
  Fe  Fe3  1  0.509  0.760  0.249  1.0
  Ag  Ag4  1  0.026  0.206  0.810  1.0
  Ag  Ag5  1  0.526  0.794  0.690  1.0
  Ag  Ag6  1  0.974  0.794  0.190  1.0
  Ag  Ag7  1  0.474  0.206  0.310  1.0
  P  P8  1  0.291  0.826  0.954  1.0
  P  P9  1  0.791  0.174  0.546  1.0
  P  P10  1  0.709  0.174  0.046  1.0
  P  P11  1  0.209  0.826  0.454  1.0
  P  P12  1  0.246  0.425  0.956  1.0
  P  P13  1  0.746  0.575  0.544  1.0
  P  P14  1  0.754  0.575  0.044  1.0
  P  P15  1  0.254  0.425  0.456  1.0
  O  O16  1  0.414  0.965  0.848  1.0
  O  O17  1  0.914  0.035  0.652  1.0
  O  O18  1  0.586  0.035  0.152  1.0
  O  O19  1  0.086  0.965  0.348  1.0
  O  O20  1  0.303  0.813  0.114  1.0
  O  O21  1  0.803  0.187  0.386  1.0
  O  O22  1  0.697  0.187  0.886  1.0
  O  O23  1  0.197  0.813  0.614  1.0
  O  O24  1  0.346  0.619  0.946  1.0
  O  O25  1  0.846  0.381  0.554  1.0
  O  O26  1  0.654  0.381  0.054  1.0
  O  O27  1  0.154  0.619  0.446  1.0
  O  O28  1  0.111  0.860  0.898  1.0
  O  O29  1  0.611  0.140  0.602  1.0
  O  O30  1  0.889  0.140  0.102  1.0
  O  O31  1  0.389  0.860  0.398  1.0
  O  O32  1  0.089  0.492  0.861  1.0
  O  O33  1  0.589  0.508  0.639  1.0
  O  O34  1  0.911  0.508  0.139  1.0
  O  O35  1  0.411  0.492  0.361  1.0
  O  O36  1  0.209  0.309  0.119  1.0
  O  O37  1  0.709  0.691  0.381  1.0
  O  O38  1  0.791  0.691  0.881  1.0
  O  O39  1  0.291  0.309  0.619  1.0
  O  O40  1  0.365  0.319  0.893  1.0
  O  O41  1  0.865  0.681  0.607  1.0
  O  O42  1  0.635  0.681  0.107  1.0
  O  O43  1  0.135  0.319  0.393  1.0
[/CIF]
.