The material structure described by Ba10MgAs6(O12Cl)2 crystallizes in the monoclinic Pm space group. There are eight inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 9-coordinate geometry to one O(10), one O(11), one O(13), one O(14), one O(18), one O(3), one O(6), one O(7), and one O(9) atom. In the second Ba site, Ba(2) is bonded in a 7-coordinate geometry to one O(1), one O(12), one O(15), one O(17), one O(2), one O(4), and one O(5) atom. In the third Ba site, Ba(3) is bonded in a 8-coordinate geometry to one O(11), one O(2), two equivalent O(10), two equivalent O(5), and two equivalent Cl(1) atoms. In the fourth Ba site, Ba(4) is bonded in a 8-coordinate geometry to one O(17), one O(9), two equivalent O(1), two equivalent O(13), and two equivalent Cl(1) atoms. In the fifth Ba site, Ba(5) is bonded in a 8-coordinate geometry to one O(15), one O(18), two equivalent O(16), two equivalent O(3), and two equivalent Cl(1) atoms. In the sixth Ba site, Ba(6) is bonded in a 5-coordinate geometry to one O(12), two equivalent O(1), two equivalent O(10), and two equivalent Cl(1) atoms. In the seventh Ba site, Ba(7) is bonded in a 6-coordinate geometry to one O(6), one O(8), two equivalent O(13), and two equivalent Cl(1) atoms. In the eighth Ba site, Ba(8) is bonded in a 8-coordinate geometry to one O(14), one O(4), two equivalent O(3), two equivalent O(5), and two equivalent Cl(1) atoms. Mg(1) is bonded to one O(12), one O(8), and two equivalent O(16) atoms to form distorted MgO4 tetrahedra that share  a cornercorner with one As(5)O4 tetrahedra. There are six inequivalent As sites. In the first As site, As(1) is bonded in a tetrahedral geometry to one O(11), one O(15), and two equivalent O(13) atoms. In the second As site, As(2) is bonded in a tetrahedral geometry to one O(4), one O(6), and two equivalent O(1) atoms. In the third As site, As(3) is bonded in a distorted trigonal non-coplanar geometry to one O(14) and two equivalent O(16) atoms. In the fourth As site, As(4) is bonded in a tetrahedral geometry to one O(2), one O(9), and two equivalent O(3) atoms. In the fifth As site, As(5) is bonded to one O(7), one O(8), and two equivalent O(5) atoms to form AsO4 tetrahedra that share  a cornercorner with one Mg(1)O4 tetrahedra. In the sixth As site, As(6) is bonded in a tetrahedral geometry to one O(17), one O(18), and two equivalent O(10) atoms. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a 1-coordinate geometry to one Ba(2), one Ba(4), one Ba(6), and one As(2) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Ba(3), two equivalent Ba(2), and one As(4) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Ba(1), one Ba(5), one Ba(8), and one As(4) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Ba(8), two equivalent Ba(2), and one As(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Ba(2), one Ba(3), one Ba(8), and one As(5) atom. In the sixth O site, O(6) is bonded to one Ba(7), two equivalent Ba(1), and one As(2) atom to form distorted OBa3As tetrahedra that share corners with two equivalent Cl(1)Ba6 octahedra. The corner-sharing octahedral tilt angles are 67°. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to two equivalent Ba(1) and one As(5) atom. In the eighth O site, O(8) is bonded in a distorted bent 150 degrees geometry to one Ba(7), one Mg(1), and one As(5) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Ba(4), two equivalent Ba(1), and one As(4) atom. In the tenth O site, O(10) is bonded in a 1-coordinate geometry to one Ba(1), one Ba(3), one Ba(6), and one As(6) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Ba(3), two equivalent Ba(1), and one As(1) atom. In the twelfth O site, O(12) is bonded to one Ba(6), two equivalent Ba(2), and one Mg(1) atom to form distorted OBa3Mg tetrahedra that share corners with two equivalent Cl(1)Ba6 octahedra. The corner-sharing octahedral tilt angles are 49°. In the thirteenth O site, O(13) is bonded in a 1-coordinate geometry to one Ba(1), one Ba(4), one Ba(7), and one As(1) atom. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Ba(8), two equivalent Ba(1), and one As(3) atom. In the fifteenth O site, O(15) is bonded in a distorted single-bond geometry to one Ba(5), two equivalent Ba(2), and one As(1) atom. In the sixteenth O site, O(16) is bonded in a 3-coordinate geometry to one Ba(5), one Mg(1), and one As(3) atom. In the seventeenth O site, O(17) is bonded in a 1-coordinate geometry to one Ba(4), two equivalent Ba(2), and one As(6) atom. In the eighteenth O site, O(18) is bonded in a 4-coordinate geometry to one Ba(5), two equivalent Ba(1), and one As(6) atom. Cl(1) is bonded to one Ba(3), one Ba(4), one Ba(5), one Ba(6), one Ba(7), and one Ba(8) atom to form ClBa6 octahedra that share  a cornercorner with one O(6)Ba3As tetrahedra,  a cornercorner with one O(12)Ba3Mg tetrahedra, and faces with two equivalent Cl(1)Ba6 octahedra. is represented by the CIF card [CIF]
data_Ba10MgAs6(ClO12)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.047
_cell_length_b   11.309
_cell_length_c   7.818
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   122.153
_symmetry_Int_Tables_number   1
_cell_volume   826.929
_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
  Ba  Ba0  1  0.665  0.338  0.499  1.0
  Ba  Ba1  1  0.351  0.638  0.483  1.0
  Ba  Ba2  1  0.995  0.260  0.250  1.0
  Ba  Ba3  1  0.351  0.638  0.017  1.0
  Ba  Ba4  1  0.760  0.745  0.250  1.0
  Ba  Ba5  1  0.257  0.987  0.250  1.0
  Ba  Ba6  1  0.700  0.972  0.750  1.0
  Ba  Ba7  1  0.953  0.751  0.750  1.0
  Ba  Ba8  1  0.665  0.338  0.001  1.0
  Ba  Ba9  1  0.238  0.235  0.750  1.0
  Mg  Mg10  1  0.258  0.787  0.750  1.0
  As  As11  1  0.979  0.602  0.250  1.0
  As  As12  1  0.595  0.613  0.750  1.0
  As  As13  1  0.432  0.043  0.750  1.0
  As  As14  1  0.401  0.352  0.250  1.0
  As  As15  1  0.024  0.421  0.750  1.0
  As  As16  1  0.627  0.030  0.250  1.0
  Cl  Cl17  1  0.991  0.002  0.001  1.0
  Cl  Cl18  1  0.991  0.002  0.499  1.0
  O  O19  1  0.649  0.719  0.929  1.0
  O  O20  1  0.319  0.446  0.250  1.0
  O  O21  1  0.356  0.248  0.428  1.0
  O  O22  1  0.413  0.504  0.750  1.0
  O  O23  1  0.092  0.385  0.572  1.0
  O  O24  1  0.686  0.526  0.750  1.0
  O  O25  1  0.841  0.336  0.750  1.0
  O  O26  1  0.092  0.601  0.750  1.0
  O  O27  1  0.587  0.464  0.250  1.0
  O  O28  1  0.736  0.090  0.071  1.0
  O  O29  1  0.092  0.385  0.928  1.0
  O  O30  1  0.880  0.421  0.250  1.0
  O  O31  1  0.429  0.782  0.750  1.0
  O  O32  1  0.923  0.657  0.075  1.0
  O  O33  1  0.923  0.657  0.425  1.0
  O  O34  1  0.460  0.211  0.750  1.0
  O  O35  1  0.356  0.248  0.072  1.0
  O  O36  1  0.736  0.090  0.429  1.0
  O  O37  1  0.160  0.670  0.250  1.0
  O  O38  1  0.297  0.939  0.915  1.0
  O  O39  1  0.520  0.849  0.250  1.0
  O  O40  1  0.297  0.939  0.585  1.0
  O  O41  1  0.649  0.719  0.571  1.0
  O  O42  1  0.536  0.117  0.250  1.0
[/CIF]
.
The material structure described by Ba10MgAs6(O12Cl)2 crystallizes in the monoclinic Pm space group. There are eight inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 9-coordinate geometry to one O(10), one O(11), one O(13), one O(14), one O(18), one O(3), one O(6), one O(7), and one O(9) atom. In the second Ba site, Ba(2) is bonded in a 7-coordinate geometry to one O(1), one O(12), one O(15), one O(17), one O(2), one O(4), and one O(5) atom. In the third Ba site, Ba(3) is bonded in a 8-coordinate geometry to one O(11), one O(2), two equivalent O(10), two equivalent O(5), and two equivalent Cl(1) atoms. In the fourth Ba site, Ba(4) is bonded in a 8-coordinate geometry to one O(17), one O(9), two equivalent O(1), two equivalent O(13), and two equivalent Cl(1) atoms. In the fifth Ba site, Ba(5) is bonded in a 8-coordinate geometry to one O(15), one O(18), two equivalent O(16), two equivalent O(3), and two equivalent Cl(1) atoms. In the sixth Ba site, Ba(6) is bonded in a 5-coordinate geometry to one O(12), two equivalent O(1), two equivalent O(10), and two equivalent Cl(1) atoms. In the seventh Ba site, Ba(7) is bonded in a 6-coordinate geometry to one O(6), one O(8), two equivalent O(13), and two equivalent Cl(1) atoms. In the eighth Ba site, Ba(8) is bonded in a 8-coordinate geometry to one O(14), one O(4), two equivalent O(3), two equivalent O(5), and two equivalent Cl(1) atoms. Mg(1) is bonded to one O(12), one O(8), and two equivalent O(16) atoms to form distorted MgO4 tetrahedra that share  a cornercorner with one As(5)O4 tetrahedra. There are six inequivalent As sites. In the first As site, As(1) is bonded in a tetrahedral geometry to one O(11), one O(15), and two equivalent O(13) atoms. In the second As site, As(2) is bonded in a tetrahedral geometry to one O(4), one O(6), and two equivalent O(1) atoms. In the third As site, As(3) is bonded in a distorted trigonal non-coplanar geometry to one O(14) and two equivalent O(16) atoms. In the fourth As site, As(4) is bonded in a tetrahedral geometry to one O(2), one O(9), and two equivalent O(3) atoms. In the fifth As site, As(5) is bonded to one O(7), one O(8), and two equivalent O(5) atoms to form AsO4 tetrahedra that share  a cornercorner with one Mg(1)O4 tetrahedra. In the sixth As site, As(6) is bonded in a tetrahedral geometry to one O(17), one O(18), and two equivalent O(10) atoms. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a 1-coordinate geometry to one Ba(2), one Ba(4), one Ba(6), and one As(2) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Ba(3), two equivalent Ba(2), and one As(4) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Ba(1), one Ba(5), one Ba(8), and one As(4) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Ba(8), two equivalent Ba(2), and one As(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Ba(2), one Ba(3), one Ba(8), and one As(5) atom. In the sixth O site, O(6) is bonded to one Ba(7), two equivalent Ba(1), and one As(2) atom to form distorted OBa3As tetrahedra that share corners with two equivalent Cl(1)Ba6 octahedra. The corner-sharing octahedral tilt angles are 67°. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to two equivalent Ba(1) and one As(5) atom. In the eighth O site, O(8) is bonded in a distorted bent 150 degrees geometry to one Ba(7), one Mg(1), and one As(5) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Ba(4), two equivalent Ba(1), and one As(4) atom. In the tenth O site, O(10) is bonded in a 1-coordinate geometry to one Ba(1), one Ba(3), one Ba(6), and one As(6) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Ba(3), two equivalent Ba(1), and one As(1) atom. In the twelfth O site, O(12) is bonded to one Ba(6), two equivalent Ba(2), and one Mg(1) atom to form distorted OBa3Mg tetrahedra that share corners with two equivalent Cl(1)Ba6 octahedra. The corner-sharing octahedral tilt angles are 49°. In the thirteenth O site, O(13) is bonded in a 1-coordinate geometry to one Ba(1), one Ba(4), one Ba(7), and one As(1) atom. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Ba(8), two equivalent Ba(1), and one As(3) atom. In the fifteenth O site, O(15) is bonded in a distorted single-bond geometry to one Ba(5), two equivalent Ba(2), and one As(1) atom. In the sixteenth O site, O(16) is bonded in a 3-coordinate geometry to one Ba(5), one Mg(1), and one As(3) atom. In the seventeenth O site, O(17) is bonded in a 1-coordinate geometry to one Ba(4), two equivalent Ba(2), and one As(6) atom. In the eighteenth O site, O(18) is bonded in a 4-coordinate geometry to one Ba(5), two equivalent Ba(1), and one As(6) atom. Cl(1) is bonded to one Ba(3), one Ba(4), one Ba(5), one Ba(6), one Ba(7), and one Ba(8) atom to form ClBa6 octahedra that share  a cornercorner with one O(6)Ba3As tetrahedra,  a cornercorner with one O(12)Ba3Mg tetrahedra, and faces with two equivalent Cl(1)Ba6 octahedra. is represented by the CIF card [CIF]
data_Ba10MgAs6(ClO12)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.047
_cell_length_b   11.309
_cell_length_c   7.818
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   122.153
_symmetry_Int_Tables_number   1
_cell_volume   826.929
_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
  Ba  Ba0  1  0.665  0.338  0.499  1.0
  Ba  Ba1  1  0.351  0.638  0.483  1.0
  Ba  Ba2  1  0.995  0.260  0.250  1.0
  Ba  Ba3  1  0.351  0.638  0.017  1.0
  Ba  Ba4  1  0.760  0.745  0.250  1.0
  Ba  Ba5  1  0.257  0.987  0.250  1.0
  Ba  Ba6  1  0.700  0.972  0.750  1.0
  Ba  Ba7  1  0.953  0.751  0.750  1.0
  Ba  Ba8  1  0.665  0.338  0.001  1.0
  Ba  Ba9  1  0.238  0.235  0.750  1.0
  Mg  Mg10  1  0.258  0.787  0.750  1.0
  As  As11  1  0.979  0.602  0.250  1.0
  As  As12  1  0.595  0.613  0.750  1.0
  As  As13  1  0.432  0.043  0.750  1.0
  As  As14  1  0.401  0.352  0.250  1.0
  As  As15  1  0.024  0.421  0.750  1.0
  As  As16  1  0.627  0.030  0.250  1.0
  Cl  Cl17  1  0.991  0.002  0.001  1.0
  Cl  Cl18  1  0.991  0.002  0.499  1.0
  O  O19  1  0.649  0.719  0.929  1.0
  O  O20  1  0.319  0.446  0.250  1.0
  O  O21  1  0.356  0.248  0.428  1.0
  O  O22  1  0.413  0.504  0.750  1.0
  O  O23  1  0.092  0.385  0.572  1.0
  O  O24  1  0.686  0.526  0.750  1.0
  O  O25  1  0.841  0.336  0.750  1.0
  O  O26  1  0.092  0.601  0.750  1.0
  O  O27  1  0.587  0.464  0.250  1.0
  O  O28  1  0.736  0.090  0.071  1.0
  O  O29  1  0.092  0.385  0.928  1.0
  O  O30  1  0.880  0.421  0.250  1.0
  O  O31  1  0.429  0.782  0.750  1.0
  O  O32  1  0.923  0.657  0.075  1.0
  O  O33  1  0.923  0.657  0.425  1.0
  O  O34  1  0.460  0.211  0.750  1.0
  O  O35  1  0.356  0.248  0.072  1.0
  O  O36  1  0.736  0.090  0.429  1.0
  O  O37  1  0.160  0.670  0.250  1.0
  O  O38  1  0.297  0.939  0.915  1.0
  O  O39  1  0.520  0.849  0.250  1.0
  O  O40  1  0.297  0.939  0.585  1.0
  O  O41  1  0.649  0.719  0.571  1.0
  O  O42  1  0.536  0.117  0.250  1.0
[/CIF]
.