The material structure described by MgWP2O7 crystallizes in the triclinic P-1 space group. Mg(1) is bonded to one O(3), one O(5), one O(7), and two equivalent O(4) atoms to form distorted MgO5 trigonal bipyramids that share  a cornercorner with one P(1)O4 tetrahedra, corners with four equivalent P(2)O4 tetrahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. W(1) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(2), one O(3), and one O(7) 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(6) atom to form PO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra and  a cornercorner with one Mg(1)O5 trigonal bipyramid. In the second P site, P(2) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra and corners with four equivalent Mg(1)O5 trigonal bipyramids. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one W(1) and one P(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one W(1) and one P(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Mg(1), one W(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Mg(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Mg(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one P(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Mg(1), one W(1), and one P(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgP2WO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.579
_cell_length_b   6.683
_cell_length_c   8.004
_cell_angle_alpha   99.666
_cell_angle_beta   88.603
_cell_angle_gamma   108.682
_symmetry_Int_Tables_number   1
_cell_volume   278.549
_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
  Mg  Mg0  1  0.656  0.661  0.373  1.0
  Mg  Mg1  1  0.344  0.339  0.627  1.0
  P  P2  1  0.828  0.672  0.881  1.0
  P  P3  1  0.172  0.328  0.119  1.0
  P  P4  1  0.796  0.216  0.389  1.0
  P  P5  1  0.204  0.784  0.611  1.0
  W  W6  1  0.706  0.148  0.828  1.0
  W  W7  1  0.294  0.852  0.172  1.0
  O  O8  1  0.911  0.695  0.066  1.0
  O  O9  1  0.089  0.305  0.934  1.0
  O  O10  1  0.731  0.842  0.839  1.0
  O  O11  1  0.269  0.158  0.161  1.0
  O  O12  1  0.632  0.449  0.818  1.0
  O  O13  1  0.368  0.551  0.182  1.0
  O  O14  1  0.384  0.655  0.555  1.0
  O  O15  1  0.616  0.345  0.445  1.0
  O  O16  1  0.001  0.238  0.518  1.0
  O  O17  1  0.999  0.762  0.482  1.0
  O  O18  1  0.918  0.322  0.226  1.0
  O  O19  1  0.347  0.025  0.677  1.0
  O  O20  1  0.653  0.975  0.323  1.0
  O  O21  1  0.082  0.678  0.774  1.0
[/CIF]
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The material structure described by MgWP2O7 crystallizes in the triclinic P-1 space group. Mg(1) is bonded to one O(3), one O(5), one O(7), and two equivalent O(4) atoms to form distorted MgO5 trigonal bipyramids that share  a cornercorner with one P(1)O4 tetrahedra, corners with four equivalent P(2)O4 tetrahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. W(1) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(2), one O(3), and one O(7) 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(6) atom to form PO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra and  a cornercorner with one Mg(1)O5 trigonal bipyramid. In the second P site, P(2) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra and corners with four equivalent Mg(1)O5 trigonal bipyramids. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one W(1) and one P(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one W(1) and one P(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Mg(1), one W(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Mg(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Mg(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one P(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Mg(1), one W(1), and one P(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgP2WO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.579
_cell_length_b   6.683
_cell_length_c   8.004
_cell_angle_alpha   99.666
_cell_angle_beta   88.603
_cell_angle_gamma   108.682
_symmetry_Int_Tables_number   1
_cell_volume   278.549
_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
  Mg  Mg0  1  0.656  0.661  0.373  1.0
  Mg  Mg1  1  0.344  0.339  0.627  1.0
  P  P2  1  0.828  0.672  0.881  1.0
  P  P3  1  0.172  0.328  0.119  1.0
  P  P4  1  0.796  0.216  0.389  1.0
  P  P5  1  0.204  0.784  0.611  1.0
  W  W6  1  0.706  0.148  0.828  1.0
  W  W7  1  0.294  0.852  0.172  1.0
  O  O8  1  0.911  0.695  0.066  1.0
  O  O9  1  0.089  0.305  0.934  1.0
  O  O10  1  0.731  0.842  0.839  1.0
  O  O11  1  0.269  0.158  0.161  1.0
  O  O12  1  0.632  0.449  0.818  1.0
  O  O13  1  0.368  0.551  0.182  1.0
  O  O14  1  0.384  0.655  0.555  1.0
  O  O15  1  0.616  0.345  0.445  1.0
  O  O16  1  0.001  0.238  0.518  1.0
  O  O17  1  0.999  0.762  0.482  1.0
  O  O18  1  0.918  0.322  0.226  1.0
  O  O19  1  0.347  0.025  0.677  1.0
  O  O20  1  0.653  0.975  0.323  1.0
  O  O21  1  0.082  0.678  0.774  1.0
[/CIF]
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