The compound described by MgWP2O7 crystallizes in the triclinic P-1 space group. Mg(1) is bonded to one O(3), one O(4), one O(6), and two equivalent O(5) atoms to form distorted MgO5 square pyramids that share corners with two equivalent P(2)O4 tetrahedra, corners with three equivalent P(1)O4 tetrahedra, and  an edgeedge with one Mg(1)O5 square pyramid. W(1) is bonded in a rectangular see-saw-like geometry to one O(2), one O(4), one O(6), 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(5), and one O(6) atom to form PO4 tetrahedra that share corners with three equivalent Mg(1)O5 square pyramids and  a cornercorner with one P(2)O4 tetrahedra. In the second P site, P(2) is bonded to one O(1), one O(3), one O(4), and one O(7) atom to form PO4 tetrahedra that share corners with two equivalent Mg(1)O5 square pyramids and  a cornercorner with one P(1)O4 tetrahedra. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) 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 bent 120 degrees geometry to one Mg(1) and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Mg(1), one W(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to two equivalent Mg(1) and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Mg(1), one W(1), and one P(1) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one W(1) and one P(2) atom. is represented by the CIF card [CIF]
data_MgP2WO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.460
_cell_length_b   6.843
_cell_length_c   7.314
_cell_angle_alpha   107.002
_cell_angle_beta   112.587
_cell_angle_gamma   84.405
_symmetry_Int_Tables_number   1
_cell_volume   285.434
_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  0.330  0.802  0.905  1.0
  Mg  Mg1  1  0.670  0.198  0.095  1.0
  P  P2  1  0.227  0.130  0.250  1.0
  P  P3  1  0.773  0.870  0.750  1.0
  P  P4  1  0.633  0.632  0.317  1.0
  P  P5  1  0.367  0.368  0.683  1.0
  W  W6  1  0.104  0.619  0.214  1.0
  W  W7  1  0.896  0.381  0.786  1.0
  O  O8  1  0.591  0.780  0.518  1.0
  O  O9  1  0.409  0.220  0.482  1.0
  O  O10  1  0.112  0.943  0.240  1.0
  O  O11  1  0.888  0.057  0.760  1.0
  O  O12  1  0.326  0.582  0.658  1.0
  O  O13  1  0.674  0.418  0.342  1.0
  O  O14  1  0.595  0.354  0.860  1.0
  O  O15  1  0.405  0.646  0.140  1.0
  O  O16  1  0.629  0.919  0.886  1.0
  O  O17  1  0.371  0.081  0.114  1.0
  O  O18  1  0.951  0.703  0.790  1.0
  O  O19  1  0.049  0.297  0.210  1.0
  O  O20  1  0.177  0.275  0.705  1.0
  O  O21  1  0.823  0.725  0.295  1.0
[/CIF]
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The compound described by MgWP2O7 crystallizes in the triclinic P-1 space group. Mg(1) is bonded to one O(3), one O(4), one O(6), and two equivalent O(5) atoms to form distorted MgO5 square pyramids that share corners with two equivalent P(2)O4 tetrahedra, corners with three equivalent P(1)O4 tetrahedra, and  an edgeedge with one Mg(1)O5 square pyramid. W(1) is bonded in a rectangular see-saw-like geometry to one O(2), one O(4), one O(6), 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(5), and one O(6) atom to form PO4 tetrahedra that share corners with three equivalent Mg(1)O5 square pyramids and  a cornercorner with one P(2)O4 tetrahedra. In the second P site, P(2) is bonded to one O(1), one O(3), one O(4), and one O(7) atom to form PO4 tetrahedra that share corners with two equivalent Mg(1)O5 square pyramids and  a cornercorner with one P(1)O4 tetrahedra. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) 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 bent 120 degrees geometry to one Mg(1) and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Mg(1), one W(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to two equivalent Mg(1) and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Mg(1), one W(1), and one P(1) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one W(1) and one P(2) atom. is represented by the CIF card [CIF]
data_MgP2WO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.460
_cell_length_b   6.843
_cell_length_c   7.314
_cell_angle_alpha   107.002
_cell_angle_beta   112.587
_cell_angle_gamma   84.405
_symmetry_Int_Tables_number   1
_cell_volume   285.434
_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  0.330  0.802  0.905  1.0
  Mg  Mg1  1  0.670  0.198  0.095  1.0
  P  P2  1  0.227  0.130  0.250  1.0
  P  P3  1  0.773  0.870  0.750  1.0
  P  P4  1  0.633  0.632  0.317  1.0
  P  P5  1  0.367  0.368  0.683  1.0
  W  W6  1  0.104  0.619  0.214  1.0
  W  W7  1  0.896  0.381  0.786  1.0
  O  O8  1  0.591  0.780  0.518  1.0
  O  O9  1  0.409  0.220  0.482  1.0
  O  O10  1  0.112  0.943  0.240  1.0
  O  O11  1  0.888  0.057  0.760  1.0
  O  O12  1  0.326  0.582  0.658  1.0
  O  O13  1  0.674  0.418  0.342  1.0
  O  O14  1  0.595  0.354  0.860  1.0
  O  O15  1  0.405  0.646  0.140  1.0
  O  O16  1  0.629  0.919  0.886  1.0
  O  O17  1  0.371  0.081  0.114  1.0
  O  O18  1  0.951  0.703  0.790  1.0
  O  O19  1  0.049  0.297  0.210  1.0
  O  O20  1  0.177  0.275  0.705  1.0
  O  O21  1  0.823  0.725  0.295  1.0
[/CIF]
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