The compound described by MgPb2(WO4)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(4), one O(6), and one O(7) atom to form distorted MgO4 tetrahedra that share corners with two equivalent W(2)O6 octahedra, corners with two equivalent Pb(1)O4 tetrahedra, and  an edgeedge with one W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 34-37°. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(8) atom to form WO6 octahedra that share corners with four equivalent Pb(1)O4 tetrahedra, edges with two equivalent W(2)O6 octahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. In the second W site, W(2) is bonded to one O(2), one O(3), one O(5), one O(6), one O(7), and one O(8) atom to form distorted WO6 octahedra that share corners with two equivalent Mg(1)O4 tetrahedra, corners with two equivalent Pb(1)O4 tetrahedra, and edges with two equivalent W(1)O6 octahedra. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form distorted PbO4 tetrahedra that share corners with two equivalent W(2)O6 octahedra, corners with four equivalent W(1)O6 octahedra, and corners with two equivalent Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 48-69°. In the second Pb site, Pb(2) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(5), one O(6), one O(7), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Mg(1), one W(1), and one Pb(1) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one W(1), one W(2), and one Pb(2) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one W(1), one W(2), one Pb(1), and one Pb(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Mg(1), one W(1), and one Pb(1) atom. In the fifth O site, O(5) is bonded in a distorted tetrahedral geometry to one W(1), one W(2), one Pb(1), and one Pb(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Mg(1), one W(2), and one Pb(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Mg(1), one W(2), and one Pb(2) atom. In the eighth O site, O(8) is bonded in a distorted trigonal non-coplanar geometry to one W(1), one W(2), and one Pb(2) atom. is represented by the CIF card [CIF]
data_MgPb2(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.389
_cell_length_b   5.508
_cell_length_c   8.324
_cell_angle_alpha   107.348
_cell_angle_beta   106.959
_cell_angle_gamma   96.455
_symmetry_Int_Tables_number   1
_cell_volume   220.163
_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
  Mg  Mg0  1  0.981  0.730  0.959  1.0
  Pb  Pb1  1  0.632  0.383  0.264  1.0
  Pb  Pb2  1  0.331  0.583  0.672  1.0
  W  W3  1  0.179  0.928  0.356  1.0
  W  W4  1  0.814  0.064  0.628  1.0
  O  O5  1  0.890  0.667  0.160  1.0
  O  O6  1  0.508  0.226  0.541  1.0
  O  O7  1  0.477  0.746  0.433  1.0
  O  O8  1  0.271  0.998  0.162  1.0
  O  O9  1  0.962  0.192  0.436  1.0
  O  O10  1  0.016  0.400  0.800  1.0
  O  O11  1  0.798  0.908  0.800  1.0
  O  O12  1  0.039  0.818  0.540  1.0
[/CIF]
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The compound described by MgPb2(WO4)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(4), one O(6), and one O(7) atom to form distorted MgO4 tetrahedra that share corners with two equivalent W(2)O6 octahedra, corners with two equivalent Pb(1)O4 tetrahedra, and  an edgeedge with one W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 34-37°. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(8) atom to form WO6 octahedra that share corners with four equivalent Pb(1)O4 tetrahedra, edges with two equivalent W(2)O6 octahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. In the second W site, W(2) is bonded to one O(2), one O(3), one O(5), one O(6), one O(7), and one O(8) atom to form distorted WO6 octahedra that share corners with two equivalent Mg(1)O4 tetrahedra, corners with two equivalent Pb(1)O4 tetrahedra, and edges with two equivalent W(1)O6 octahedra. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form distorted PbO4 tetrahedra that share corners with two equivalent W(2)O6 octahedra, corners with four equivalent W(1)O6 octahedra, and corners with two equivalent Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 48-69°. In the second Pb site, Pb(2) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(5), one O(6), one O(7), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Mg(1), one W(1), and one Pb(1) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one W(1), one W(2), and one Pb(2) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one W(1), one W(2), one Pb(1), and one Pb(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Mg(1), one W(1), and one Pb(1) atom. In the fifth O site, O(5) is bonded in a distorted tetrahedral geometry to one W(1), one W(2), one Pb(1), and one Pb(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Mg(1), one W(2), and one Pb(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Mg(1), one W(2), and one Pb(2) atom. In the eighth O site, O(8) is bonded in a distorted trigonal non-coplanar geometry to one W(1), one W(2), and one Pb(2) atom. is represented by the CIF card [CIF]
data_MgPb2(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.389
_cell_length_b   5.508
_cell_length_c   8.324
_cell_angle_alpha   107.348
_cell_angle_beta   106.959
_cell_angle_gamma   96.455
_symmetry_Int_Tables_number   1
_cell_volume   220.163
_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
  Mg  Mg0  1  0.981  0.730  0.959  1.0
  Pb  Pb1  1  0.632  0.383  0.264  1.0
  Pb  Pb2  1  0.331  0.583  0.672  1.0
  W  W3  1  0.179  0.928  0.356  1.0
  W  W4  1  0.814  0.064  0.628  1.0
  O  O5  1  0.890  0.667  0.160  1.0
  O  O6  1  0.508  0.226  0.541  1.0
  O  O7  1  0.477  0.746  0.433  1.0
  O  O8  1  0.271  0.998  0.162  1.0
  O  O9  1  0.962  0.192  0.436  1.0
  O  O10  1  0.016  0.400  0.800  1.0
  O  O11  1  0.798  0.908  0.800  1.0
  O  O12  1  0.039  0.818  0.540  1.0
[/CIF]
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