The compound described by MgCu2(SnO4)2 crystallizes in the monoclinic P2_1/c space group. Mg(1) is bonded to one O(1), one O(4), one O(7), one O(8), and two equivalent O(3) atoms to form edge-sharing MgO6 octahedra. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(5), one O(6), and one O(7) atom. In the second Cu site, Cu(2) is bonded in a 6-coordinate geometry to one O(4), one O(5), one O(6), one O(8), and two equivalent O(2) atoms. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), one O(6), and one O(7) atom. In the second Sn site, Sn(2) is bonded in a 5-coordinate geometry to 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(7) is bonded in a distorted trigonal pyramidal geometry to one Mg(1), one Cu(1), one Sn(1), and one Sn(2) atom. In the second O site, O(8) is bonded in a trigonal non-coplanar geometry to one Mg(1), one Cu(2), and one Sn(2) atom. In the third O site, O(1) is bonded in a trigonal non-coplanar geometry to one Mg(1), one Cu(1), and one Sn(1) atom. In the fourth O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Cu(2) and one Sn(1) atom. In the fifth O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Mg(1) and one Sn(2) atom. In the sixth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Cu(2), and one Sn(1) atom. In the seventh O site, O(5) is bonded in a distorted water-like geometry to one Cu(1), one Cu(2), and one Sn(2) atom. In the eighth O site, O(6) is bonded in a 4-coordinate geometry to one Cu(1), one Cu(2), one Sn(1), and one Sn(2) atom. is represented by the CIF card [CIF]
data_MgCu2(SnO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.235
_cell_length_b   8.726
_cell_length_c   12.189
_cell_angle_alpha   90.000
_cell_angle_beta   89.363
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   663.131
_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
  Mg  Mg0  1  0.101  0.151  0.032  1.0
  Mg  Mg1  1  0.899  0.849  0.968  1.0
  Mg  Mg2  1  0.899  0.651  0.468  1.0
  Mg  Mg3  1  0.101  0.349  0.532  1.0
  Cu  Cu4  1  0.754  0.189  0.837  1.0
  Cu  Cu5  1  0.372  0.072  0.608  1.0
  Cu  Cu6  1  0.628  0.928  0.392  1.0
  Cu  Cu7  1  0.246  0.811  0.163  1.0
  Cu  Cu8  1  0.754  0.311  0.337  1.0
  Cu  Cu9  1  0.372  0.428  0.108  1.0
  Cu  Cu10  1  0.246  0.689  0.663  1.0
  Cu  Cu11  1  0.628  0.572  0.892  1.0
  Sn  Sn12  1  0.095  0.452  0.840  1.0
  Sn  Sn13  1  0.095  0.048  0.340  1.0
  Sn  Sn14  1  0.568  0.070  0.148  1.0
  Sn  Sn15  1  0.905  0.952  0.660  1.0
  Sn  Sn16  1  0.432  0.930  0.852  1.0
  Sn  Sn17  1  0.432  0.570  0.352  1.0
  Sn  Sn18  1  0.568  0.430  0.648  1.0
  Sn  Sn19  1  0.905  0.548  0.160  1.0
  O  O20  1  0.033  0.265  0.376  1.0
  O  O21  1  0.651  0.016  0.575  1.0
  O  O22  1  0.196  0.555  0.460  1.0
  O  O23  1  0.804  0.055  0.040  1.0
  O  O24  1  0.033  0.235  0.876  1.0
  O  O25  1  0.967  0.735  0.624  1.0
  O  O26  1  0.084  0.128  0.605  1.0
  O  O27  1  0.525  0.848  0.193  1.0
  O  O28  1  0.525  0.652  0.693  1.0
  O  O29  1  0.280  0.897  0.700  1.0
  O  O30  1  0.720  0.397  0.800  1.0
  O  O31  1  0.475  0.152  0.807  1.0
  O  O32  1  0.916  0.872  0.395  1.0
  O  O33  1  0.800  0.526  0.318  1.0
  O  O34  1  0.417  0.271  0.558  1.0
  O  O35  1  0.417  0.229  0.058  1.0
  O  O36  1  0.200  0.026  0.182  1.0
  O  O37  1  0.475  0.348  0.307  1.0
  O  O38  1  0.200  0.474  0.682  1.0
  O  O39  1  0.804  0.445  0.540  1.0
  O  O40  1  0.651  0.484  0.075  1.0
  O  O41  1  0.720  0.103  0.300  1.0
  O  O42  1  0.967  0.765  0.124  1.0
  O  O43  1  0.084  0.372  0.105  1.0
  O  O44  1  0.196  0.945  0.960  1.0
  O  O45  1  0.583  0.771  0.942  1.0
  O  O46  1  0.349  0.984  0.425  1.0
  O  O47  1  0.349  0.516  0.925  1.0
  O  O48  1  0.916  0.628  0.895  1.0
  O  O49  1  0.583  0.729  0.442  1.0
  O  O50  1  0.280  0.603  0.200  1.0
  O  O51  1  0.800  0.974  0.818  1.0
[/CIF]
.
The compound described by MgCu2(SnO4)2 crystallizes in the monoclinic P2_1/c space group. Mg(1) is bonded to one O(1), one O(4), one O(7), one O(8), and two equivalent O(3) atoms to form edge-sharing MgO6 octahedra. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(5), one O(6), and one O(7) atom. In the second Cu site, Cu(2) is bonded in a 6-coordinate geometry to one O(4), one O(5), one O(6), one O(8), and two equivalent O(2) atoms. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), one O(6), and one O(7) atom. In the second Sn site, Sn(2) is bonded in a 5-coordinate geometry to 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(7) is bonded in a distorted trigonal pyramidal geometry to one Mg(1), one Cu(1), one Sn(1), and one Sn(2) atom. In the second O site, O(8) is bonded in a trigonal non-coplanar geometry to one Mg(1), one Cu(2), and one Sn(2) atom. In the third O site, O(1) is bonded in a trigonal non-coplanar geometry to one Mg(1), one Cu(1), and one Sn(1) atom. In the fourth O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Cu(2) and one Sn(1) atom. In the fifth O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Mg(1) and one Sn(2) atom. In the sixth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Cu(2), and one Sn(1) atom. In the seventh O site, O(5) is bonded in a distorted water-like geometry to one Cu(1), one Cu(2), and one Sn(2) atom. In the eighth O site, O(6) is bonded in a 4-coordinate geometry to one Cu(1), one Cu(2), one Sn(1), and one Sn(2) atom. is represented by the CIF card [CIF]
data_MgCu2(SnO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.235
_cell_length_b   8.726
_cell_length_c   12.189
_cell_angle_alpha   90.000
_cell_angle_beta   89.363
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   663.131
_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
  Mg  Mg0  1  0.101  0.151  0.032  1.0
  Mg  Mg1  1  0.899  0.849  0.968  1.0
  Mg  Mg2  1  0.899  0.651  0.468  1.0
  Mg  Mg3  1  0.101  0.349  0.532  1.0
  Cu  Cu4  1  0.754  0.189  0.837  1.0
  Cu  Cu5  1  0.372  0.072  0.608  1.0
  Cu  Cu6  1  0.628  0.928  0.392  1.0
  Cu  Cu7  1  0.246  0.811  0.163  1.0
  Cu  Cu8  1  0.754  0.311  0.337  1.0
  Cu  Cu9  1  0.372  0.428  0.108  1.0
  Cu  Cu10  1  0.246  0.689  0.663  1.0
  Cu  Cu11  1  0.628  0.572  0.892  1.0
  Sn  Sn12  1  0.095  0.452  0.840  1.0
  Sn  Sn13  1  0.095  0.048  0.340  1.0
  Sn  Sn14  1  0.568  0.070  0.148  1.0
  Sn  Sn15  1  0.905  0.952  0.660  1.0
  Sn  Sn16  1  0.432  0.930  0.852  1.0
  Sn  Sn17  1  0.432  0.570  0.352  1.0
  Sn  Sn18  1  0.568  0.430  0.648  1.0
  Sn  Sn19  1  0.905  0.548  0.160  1.0
  O  O20  1  0.033  0.265  0.376  1.0
  O  O21  1  0.651  0.016  0.575  1.0
  O  O22  1  0.196  0.555  0.460  1.0
  O  O23  1  0.804  0.055  0.040  1.0
  O  O24  1  0.033  0.235  0.876  1.0
  O  O25  1  0.967  0.735  0.624  1.0
  O  O26  1  0.084  0.128  0.605  1.0
  O  O27  1  0.525  0.848  0.193  1.0
  O  O28  1  0.525  0.652  0.693  1.0
  O  O29  1  0.280  0.897  0.700  1.0
  O  O30  1  0.720  0.397  0.800  1.0
  O  O31  1  0.475  0.152  0.807  1.0
  O  O32  1  0.916  0.872  0.395  1.0
  O  O33  1  0.800  0.526  0.318  1.0
  O  O34  1  0.417  0.271  0.558  1.0
  O  O35  1  0.417  0.229  0.058  1.0
  O  O36  1  0.200  0.026  0.182  1.0
  O  O37  1  0.475  0.348  0.307  1.0
  O  O38  1  0.200  0.474  0.682  1.0
  O  O39  1  0.804  0.445  0.540  1.0
  O  O40  1  0.651  0.484  0.075  1.0
  O  O41  1  0.720  0.103  0.300  1.0
  O  O42  1  0.967  0.765  0.124  1.0
  O  O43  1  0.084  0.372  0.105  1.0
  O  O44  1  0.196  0.945  0.960  1.0
  O  O45  1  0.583  0.771  0.942  1.0
  O  O46  1  0.349  0.984  0.425  1.0
  O  O47  1  0.349  0.516  0.925  1.0
  O  O48  1  0.916  0.628  0.895  1.0
  O  O49  1  0.583  0.729  0.442  1.0
  O  O50  1  0.280  0.603  0.200  1.0
  O  O51  1  0.800  0.974  0.818  1.0
[/CIF]
.