The structure described by MgZn4(Se2O5)4 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a 5-coordinate geometry to one O(1), one O(13), one O(17), one O(20), and one O(5) atom. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a square pyramidal geometry to one O(15), one O(18), one O(19), one O(6), and one O(7) atom. In the second Zn site, Zn(2) is bonded in a 4-coordinate geometry to one O(13), one O(16), one O(20), one O(5), and one O(8) atom. In the third Zn site, Zn(3) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(14), one O(15), one O(18), and one O(19) atom. In the fourth Zn site, Zn(4) is bonded in a 5-coordinate geometry to one O(12), one O(13), one O(16), one O(17), and one O(9) atom. There are eight inequivalent Se sites. In the first Se site, Se(1) is bonded in a distorted water-like geometry to one O(19) and one O(2) atom. In the second Se site, Se(2) is bonded in a distorted trigonal non-coplanar geometry to one O(20), one O(5), and one O(6) atom. In the third Se site, Se(3) is bonded in a trigonal non-coplanar geometry to one O(1), one O(17), and one O(7) atom. In the fourth Se site, Se(4) is bonded in a distorted trigonal non-coplanar geometry to one O(18), one O(2), and one O(8) atom. In the fifth Se site, Se(5) is bonded in a distorted trigonal non-coplanar geometry to one O(15), one O(4), and one O(9) atom. In the sixth Se site, Se(6) is bonded in a trigonal non-coplanar geometry to one O(10), one O(16), and one O(3) atom. In the seventh Se site, Se(7) is bonded in a distorted trigonal non-coplanar geometry to one O(11), one O(13), and one O(3) atom. In the eighth Se site, Se(8) is bonded in a distorted trigonal non-coplanar geometry to one O(12), one O(14), and one O(4) atom. There are twenty inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Mg(1) and one Se(3) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Se(1) and one Se(4) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Se(6) and one Se(7) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Se(5) and one Se(8) atom. In the fifth O site, O(5) is bonded in a T-shaped geometry to one Mg(1), one Zn(2), and one Se(2) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Zn(1) and one Se(2) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Zn(1) and one Se(3) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Zn(2) and one Se(4) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Zn(4) and one Se(5) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Zn(3) and one Se(6) atom. In the eleventh O site, O(11) is bonded in a 2-coordinate geometry to one Zn(3) and one Se(7) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Zn(4) and one Se(8) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one Mg(1), one Zn(2), one Zn(4), and one Se(7) atom. In the fourteenth O site, O(14) is bonded in a bent 120 degrees geometry to one Zn(3) and one Se(8) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal planar geometry to one Zn(1), one Zn(3), and one Se(5) atom. In the sixteenth O site, O(16) is bonded in a distorted trigonal non-coplanar geometry to one Zn(2), one Zn(4), and one Se(6) atom. In the seventeenth O site, O(17) is bonded in a 3-coordinate geometry to one Mg(1), one Zn(4), and one Se(3) atom. In the eighteenth O site, O(18) is bonded in a distorted trigonal planar geometry to one Zn(1), one Zn(3), and one Se(4) atom. In the nineteenth O site, O(19) is bonded in a trigonal non-coplanar geometry to one Zn(1), one Zn(3), and one Se(1) atom. In the twentieth O site, O(20) is bonded in a distorted T-shaped geometry to one Mg(1), one Zn(2), and one Se(2) atom. is represented by the CIF file [CIF]
data_MgZn4(Se2O5)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.332
_cell_length_b   6.840
_cell_length_c   10.980
_cell_angle_alpha   90.564
_cell_angle_beta   94.992
_cell_angle_gamma   92.163
_symmetry_Int_Tables_number   1
_cell_volume   473.439
_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  0.941  0.303  0.616  1.0
  Zn  Zn1  1  0.752  0.968  0.911  1.0
  Zn  Zn2  1  0.347  0.521  0.563  1.0
  Zn  Zn3  1  0.236  0.001  0.047  1.0
  Zn  Zn4  1  0.782  0.551  0.413  1.0
  Se  Se5  1  0.972  0.380  0.874  1.0
  Se  Se6  1  0.487  0.146  0.662  1.0
  Se  Se7  1  0.983  0.835  0.670  1.0
  Se  Se8  1  0.450  0.615  0.858  1.0
  Se  Se9  1  0.937  0.641  0.148  1.0
  Se  Se10  1  0.448  0.884  0.343  1.0
  Se  Se11  1  0.015  0.131  0.340  1.0
  Se  Se12  1  0.494  0.380  0.169  1.0
  O  O13  1  0.839  0.008  0.589  1.0
  O  O14  1  0.213  0.522  0.935  1.0
  O  O15  1  0.244  0.990  0.426  1.0
  O  O16  1  0.678  0.538  0.085  1.0
  O  O17  1  0.257  0.279  0.667  1.0
  O  O18  1  0.612  0.188  0.806  1.0
  O  O19  1  0.824  0.761  0.782  1.0
  O  O20  1  0.355  0.683  0.716  1.0
  O  O21  1  0.862  0.736  0.282  1.0
  O  O22  1  0.319  0.809  0.209  1.0
  O  O23  1  0.129  0.207  0.217  1.0
  O  O24  1  0.659  0.327  0.297  1.0
  O  O25  1  0.044  0.334  0.438  1.0
  O  O26  1  0.502  0.173  0.084  1.0
  O  O27  1  0.941  0.846  0.058  1.0
  O  O28  1  0.474  0.665  0.427  1.0
  O  O29  1  0.959  0.620  0.572  1.0
  O  O30  1  0.455  0.840  0.934  1.0
  O  O31  1  0.037  0.132  0.913  1.0
  O  O32  1  0.614  0.336  0.583  1.0
[/CIF]
.
The structure described by MgZn4(Se2O5)4 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a 5-coordinate geometry to one O(1), one O(13), one O(17), one O(20), and one O(5) atom. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a square pyramidal geometry to one O(15), one O(18), one O(19), one O(6), and one O(7) atom. In the second Zn site, Zn(2) is bonded in a 4-coordinate geometry to one O(13), one O(16), one O(20), one O(5), and one O(8) atom. In the third Zn site, Zn(3) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(14), one O(15), one O(18), and one O(19) atom. In the fourth Zn site, Zn(4) is bonded in a 5-coordinate geometry to one O(12), one O(13), one O(16), one O(17), and one O(9) atom. There are eight inequivalent Se sites. In the first Se site, Se(1) is bonded in a distorted water-like geometry to one O(19) and one O(2) atom. In the second Se site, Se(2) is bonded in a distorted trigonal non-coplanar geometry to one O(20), one O(5), and one O(6) atom. In the third Se site, Se(3) is bonded in a trigonal non-coplanar geometry to one O(1), one O(17), and one O(7) atom. In the fourth Se site, Se(4) is bonded in a distorted trigonal non-coplanar geometry to one O(18), one O(2), and one O(8) atom. In the fifth Se site, Se(5) is bonded in a distorted trigonal non-coplanar geometry to one O(15), one O(4), and one O(9) atom. In the sixth Se site, Se(6) is bonded in a trigonal non-coplanar geometry to one O(10), one O(16), and one O(3) atom. In the seventh Se site, Se(7) is bonded in a distorted trigonal non-coplanar geometry to one O(11), one O(13), and one O(3) atom. In the eighth Se site, Se(8) is bonded in a distorted trigonal non-coplanar geometry to one O(12), one O(14), and one O(4) atom. There are twenty inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Mg(1) and one Se(3) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Se(1) and one Se(4) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Se(6) and one Se(7) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Se(5) and one Se(8) atom. In the fifth O site, O(5) is bonded in a T-shaped geometry to one Mg(1), one Zn(2), and one Se(2) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Zn(1) and one Se(2) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Zn(1) and one Se(3) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Zn(2) and one Se(4) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Zn(4) and one Se(5) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Zn(3) and one Se(6) atom. In the eleventh O site, O(11) is bonded in a 2-coordinate geometry to one Zn(3) and one Se(7) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Zn(4) and one Se(8) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one Mg(1), one Zn(2), one Zn(4), and one Se(7) atom. In the fourteenth O site, O(14) is bonded in a bent 120 degrees geometry to one Zn(3) and one Se(8) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal planar geometry to one Zn(1), one Zn(3), and one Se(5) atom. In the sixteenth O site, O(16) is bonded in a distorted trigonal non-coplanar geometry to one Zn(2), one Zn(4), and one Se(6) atom. In the seventeenth O site, O(17) is bonded in a 3-coordinate geometry to one Mg(1), one Zn(4), and one Se(3) atom. In the eighteenth O site, O(18) is bonded in a distorted trigonal planar geometry to one Zn(1), one Zn(3), and one Se(4) atom. In the nineteenth O site, O(19) is bonded in a trigonal non-coplanar geometry to one Zn(1), one Zn(3), and one Se(1) atom. In the twentieth O site, O(20) is bonded in a distorted T-shaped geometry to one Mg(1), one Zn(2), and one Se(2) atom. is represented by the CIF file [CIF]
data_MgZn4(Se2O5)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.332
_cell_length_b   6.840
_cell_length_c   10.980
_cell_angle_alpha   90.564
_cell_angle_beta   94.992
_cell_angle_gamma   92.163
_symmetry_Int_Tables_number   1
_cell_volume   473.439
_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  0.941  0.303  0.616  1.0
  Zn  Zn1  1  0.752  0.968  0.911  1.0
  Zn  Zn2  1  0.347  0.521  0.563  1.0
  Zn  Zn3  1  0.236  0.001  0.047  1.0
  Zn  Zn4  1  0.782  0.551  0.413  1.0
  Se  Se5  1  0.972  0.380  0.874  1.0
  Se  Se6  1  0.487  0.146  0.662  1.0
  Se  Se7  1  0.983  0.835  0.670  1.0
  Se  Se8  1  0.450  0.615  0.858  1.0
  Se  Se9  1  0.937  0.641  0.148  1.0
  Se  Se10  1  0.448  0.884  0.343  1.0
  Se  Se11  1  0.015  0.131  0.340  1.0
  Se  Se12  1  0.494  0.380  0.169  1.0
  O  O13  1  0.839  0.008  0.589  1.0
  O  O14  1  0.213  0.522  0.935  1.0
  O  O15  1  0.244  0.990  0.426  1.0
  O  O16  1  0.678  0.538  0.085  1.0
  O  O17  1  0.257  0.279  0.667  1.0
  O  O18  1  0.612  0.188  0.806  1.0
  O  O19  1  0.824  0.761  0.782  1.0
  O  O20  1  0.355  0.683  0.716  1.0
  O  O21  1  0.862  0.736  0.282  1.0
  O  O22  1  0.319  0.809  0.209  1.0
  O  O23  1  0.129  0.207  0.217  1.0
  O  O24  1  0.659  0.327  0.297  1.0
  O  O25  1  0.044  0.334  0.438  1.0
  O  O26  1  0.502  0.173  0.084  1.0
  O  O27  1  0.941  0.846  0.058  1.0
  O  O28  1  0.474  0.665  0.427  1.0
  O  O29  1  0.959  0.620  0.572  1.0
  O  O30  1  0.455  0.840  0.934  1.0
  O  O31  1  0.037  0.132  0.913  1.0
  O  O32  1  0.614  0.336  0.583  1.0
[/CIF]
.