The compound described by MgCrPbO3 crystallizes in the monoclinic Cm space group. Mg(1) is bonded to one O(1) and four equivalent O(2) atoms to form distorted MgO5 trigonal bipyramids that share  a cornercorner with one Cr(1)O5 square pyramid, corners with four equivalent Mg(1)O5 trigonal bipyramids, and edges with four equivalent Cr(1)O5 square pyramids. Cr(1) is bonded to one O(1) and four equivalent O(2) atoms to form distorted CrO5 square pyramids that share corners with four equivalent Cr(1)O5 square pyramids,  a cornercorner with one Mg(1)O5 trigonal bipyramid, and edges with four equivalent Mg(1)O5 trigonal bipyramids. Pb(1) is bonded in a single-bond geometry to one O(1) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Mg(1), one Cr(1), and one Pb(1) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to two equivalent Mg(1) and two equivalent Cr(1) atoms. is represented by the CIF card [CIF]
data_MgCrPbO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.983
_cell_length_b   5.830
_cell_length_c   3.983
_cell_angle_alpha   71.540
_cell_angle_beta   89.259
_cell_angle_gamma   71.540
_symmetry_Int_Tables_number   1
_cell_volume   82.838
_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  0.818  0.650  0.818  1.0
  Cr  Cr1  1  0.413  0.458  0.413  1.0
  Pb  Pb2  1  0.180  0.046  0.180  1.0
  O  O3  1  0.590  0.028  0.590  1.0
  O  O4  1  0.371  0.526  0.879  1.0
  O  O5  1  0.879  0.526  0.371  1.0
[/CIF]
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The compound described by MgCrPbO3 crystallizes in the monoclinic Cm space group. Mg(1) is bonded to one O(1) and four equivalent O(2) atoms to form distorted MgO5 trigonal bipyramids that share  a cornercorner with one Cr(1)O5 square pyramid, corners with four equivalent Mg(1)O5 trigonal bipyramids, and edges with four equivalent Cr(1)O5 square pyramids. Cr(1) is bonded to one O(1) and four equivalent O(2) atoms to form distorted CrO5 square pyramids that share corners with four equivalent Cr(1)O5 square pyramids,  a cornercorner with one Mg(1)O5 trigonal bipyramid, and edges with four equivalent Mg(1)O5 trigonal bipyramids. Pb(1) is bonded in a single-bond geometry to one O(1) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Mg(1), one Cr(1), and one Pb(1) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to two equivalent Mg(1) and two equivalent Cr(1) atoms. is represented by the CIF card [CIF]
data_MgCrPbO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.983
_cell_length_b   5.830
_cell_length_c   3.983
_cell_angle_alpha   71.540
_cell_angle_beta   89.259
_cell_angle_gamma   71.540
_symmetry_Int_Tables_number   1
_cell_volume   82.838
_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  0.818  0.650  0.818  1.0
  Cr  Cr1  1  0.413  0.458  0.413  1.0
  Pb  Pb2  1  0.180  0.046  0.180  1.0
  O  O3  1  0.590  0.028  0.590  1.0
  O  O4  1  0.371  0.526  0.879  1.0
  O  O5  1  0.879  0.526  0.371  1.0
[/CIF]
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