The compound described by Ba4Ga4SnSe12 crystallizes in the tetragonal P-42_1c space group. Ba(1) is bonded in a 8-coordinate geometry to two equivalent Se(1), two equivalent Se(2), and four equivalent Se(3) atoms. Ga(1) is bonded to one Se(1), one Se(3), and two equivalent Se(2) atoms to form GaSe4 tetrahedra that share  a cornercorner with one Sn(1)Se4 tetrahedra and corners with two equivalent Ga(1)Se4 tetrahedra. Sn(1) is bonded to four equivalent Se(1) atoms to form SnSe4 tetrahedra that share corners with four equivalent Ga(1)Se4 tetrahedra. There are three inequivalent Se sites. In the first Se site, Se(3) is bonded to four equivalent Ba(1) and one Ga(1) atom to form a mixture of distorted corner and edge-sharing SeBa4Ga trigonal bipyramids. In the second Se site, Se(1) is bonded in a 4-coordinate geometry to two equivalent Ba(1), one Ga(1), and one Sn(1) atom. In the third Se site, Se(2) is bonded in a 4-coordinate geometry to two equivalent Ba(1) and two equivalent Ga(1) atoms. is represented by the CIF card [CIF]
data_Ba4Ga4SnSe12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   13.991
_cell_length_b   13.991
_cell_length_c   6.566
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1285.204
_cell_formula_units_Z   2
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  0.194  0.481  0.546  1.0
  Ba  Ba1  1  0.694  0.019  0.954  1.0
  Ba  Ba2  1  0.806  0.519  0.546  1.0
  Ba  Ba3  1  0.306  0.981  0.954  1.0
  Ba  Ba4  1  0.519  0.194  0.454  1.0
  Ba  Ba5  1  0.981  0.694  0.046  1.0
  Ba  Ba6  1  0.481  0.806  0.454  1.0
  Ba  Ba7  1  0.019  0.306  0.046  1.0
  Ga  Ga8  1  0.142  0.755  0.550  1.0
  Ga  Ga9  1  0.642  0.745  0.950  1.0
  Ga  Ga10  1  0.858  0.245  0.550  1.0
  Ga  Ga11  1  0.358  0.255  0.950  1.0
  Ga  Ga12  1  0.245  0.142  0.450  1.0
  Ga  Ga13  1  0.255  0.642  0.050  1.0
  Ga  Ga14  1  0.755  0.858  0.450  1.0
  Ga  Ga15  1  0.745  0.358  0.050  1.0
  Sn  Sn16  1  0.500  0.500  0.000  1.0
  Sn  Sn17  1  0.000  0.000  0.500  1.0
  Se  Se18  1  0.407  0.394  0.746  1.0
  Se  Se19  1  0.907  0.106  0.754  1.0
  Se  Se20  1  0.593  0.606  0.746  1.0
  Se  Se21  1  0.093  0.894  0.754  1.0
  Se  Se22  1  0.606  0.407  0.254  1.0
  Se  Se23  1  0.894  0.907  0.246  1.0
  Se  Se24  1  0.394  0.593  0.254  1.0
  Se  Se25  1  0.106  0.093  0.246  1.0
  Se  Se26  1  0.291  0.696  0.704  1.0
  Se  Se27  1  0.791  0.804  0.796  1.0
  Se  Se28  1  0.709  0.304  0.704  1.0
  Se  Se29  1  0.209  0.196  0.796  1.0
  Se  Se30  1  0.304  0.291  0.296  1.0
  Se  Se31  1  0.196  0.791  0.204  1.0
  Se  Se32  1  0.696  0.709  0.296  1.0
  Se  Se33  1  0.804  0.209  0.204  1.0
  Se  Se34  1  0.985  0.359  0.544  1.0
  Se  Se35  1  0.485  0.141  0.956  1.0
  Se  Se36  1  0.015  0.641  0.544  1.0
  Se  Se37  1  0.515  0.859  0.956  1.0
  Se  Se38  1  0.641  0.985  0.456  1.0
  Se  Se39  1  0.859  0.485  0.044  1.0
  Se  Se40  1  0.359  0.015  0.456  1.0
  Se  Se41  1  0.141  0.515  0.044  1.0
[/CIF]
.
The compound described by Ba4Ga4SnSe12 crystallizes in the tetragonal P-42_1c space group. Ba(1) is bonded in a 8-coordinate geometry to two equivalent Se(1), two equivalent Se(2), and four equivalent Se(3) atoms. Ga(1) is bonded to one Se(1), one Se(3), and two equivalent Se(2) atoms to form GaSe4 tetrahedra that share  a cornercorner with one Sn(1)Se4 tetrahedra and corners with two equivalent Ga(1)Se4 tetrahedra. Sn(1) is bonded to four equivalent Se(1) atoms to form SnSe4 tetrahedra that share corners with four equivalent Ga(1)Se4 tetrahedra. There are three inequivalent Se sites. In the first Se site, Se(3) is bonded to four equivalent Ba(1) and one Ga(1) atom to form a mixture of distorted corner and edge-sharing SeBa4Ga trigonal bipyramids. In the second Se site, Se(1) is bonded in a 4-coordinate geometry to two equivalent Ba(1), one Ga(1), and one Sn(1) atom. In the third Se site, Se(2) is bonded in a 4-coordinate geometry to two equivalent Ba(1) and two equivalent Ga(1) atoms. is represented by the CIF card [CIF]
data_Ba4Ga4SnSe12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   13.991
_cell_length_b   13.991
_cell_length_c   6.566
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   1285.204
_cell_formula_units_Z   2
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  0.194  0.481  0.546  1.0
  Ba  Ba1  1  0.694  0.019  0.954  1.0
  Ba  Ba2  1  0.806  0.519  0.546  1.0
  Ba  Ba3  1  0.306  0.981  0.954  1.0
  Ba  Ba4  1  0.519  0.194  0.454  1.0
  Ba  Ba5  1  0.981  0.694  0.046  1.0
  Ba  Ba6  1  0.481  0.806  0.454  1.0
  Ba  Ba7  1  0.019  0.306  0.046  1.0
  Ga  Ga8  1  0.142  0.755  0.550  1.0
  Ga  Ga9  1  0.642  0.745  0.950  1.0
  Ga  Ga10  1  0.858  0.245  0.550  1.0
  Ga  Ga11  1  0.358  0.255  0.950  1.0
  Ga  Ga12  1  0.245  0.142  0.450  1.0
  Ga  Ga13  1  0.255  0.642  0.050  1.0
  Ga  Ga14  1  0.755  0.858  0.450  1.0
  Ga  Ga15  1  0.745  0.358  0.050  1.0
  Sn  Sn16  1  0.500  0.500  0.000  1.0
  Sn  Sn17  1  0.000  0.000  0.500  1.0
  Se  Se18  1  0.407  0.394  0.746  1.0
  Se  Se19  1  0.907  0.106  0.754  1.0
  Se  Se20  1  0.593  0.606  0.746  1.0
  Se  Se21  1  0.093  0.894  0.754  1.0
  Se  Se22  1  0.606  0.407  0.254  1.0
  Se  Se23  1  0.894  0.907  0.246  1.0
  Se  Se24  1  0.394  0.593  0.254  1.0
  Se  Se25  1  0.106  0.093  0.246  1.0
  Se  Se26  1  0.291  0.696  0.704  1.0
  Se  Se27  1  0.791  0.804  0.796  1.0
  Se  Se28  1  0.709  0.304  0.704  1.0
  Se  Se29  1  0.209  0.196  0.796  1.0
  Se  Se30  1  0.304  0.291  0.296  1.0
  Se  Se31  1  0.196  0.791  0.204  1.0
  Se  Se32  1  0.696  0.709  0.296  1.0
  Se  Se33  1  0.804  0.209  0.204  1.0
  Se  Se34  1  0.985  0.359  0.544  1.0
  Se  Se35  1  0.485  0.141  0.956  1.0
  Se  Se36  1  0.015  0.641  0.544  1.0
  Se  Se37  1  0.515  0.859  0.956  1.0
  Se  Se38  1  0.641  0.985  0.456  1.0
  Se  Se39  1  0.859  0.485  0.044  1.0
  Se  Se40  1  0.359  0.015  0.456  1.0
  Se  Se41  1  0.141  0.515  0.044  1.0
[/CIF]
.