The structure described by CsGa2(Se2O7)2 crystallizes in the monoclinic C2/c space group. Cs(1) is bonded in a 12-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(4), two equivalent O(5), two equivalent O(6), and two equivalent O(7) atoms. Ga(1) is bonded in an octahedral geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(7) atom. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a distorted trigonal non-coplanar geometry to one O(1), one O(2), and one O(3) atom. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one O(4), one O(5), and one O(6) atom. There are seven inequivalent O sites. In the first O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one Ga(1), and one Se(1) atom. In the second O site, O(3) is bonded in a bent 120 degrees geometry to one Ga(1) and one Se(1) atom. In the third O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one Ga(1), and one Se(2) atom. In the fourth O site, O(5) is bonded in a bent 120 degrees geometry to one Cs(1), one Ga(1), and one Se(2) atom. In the fifth O site, O(6) is bonded in a distorted single-bond geometry to one Cs(1) and one Se(2) atom. In the sixth O site, O(7) is bonded in a distorted single-bond geometry to one Cs(1) and one Ga(1) atom. In the seventh O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one Ga(1), and one Se(1) atom. is represented by the CIF file [CIF]
data_CsGa2(Se2O7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.275
_cell_length_b   9.275
_cell_length_c   12.864
_cell_angle_alpha   58.716
_cell_angle_beta   58.716
_cell_angle_gamma   49.533
_symmetry_Int_Tables_number   1
_cell_volume   690.692
_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
  Cs  Cs0  1  0.757  0.243  0.750  1.0
  Cs  Cs1  1  0.243  0.757  0.250  1.0
  Ga  Ga2  1  0.736  0.634  0.888  1.0
  Ga  Ga3  1  0.264  0.366  0.112  1.0
  Ga  Ga4  1  0.634  0.736  0.388  1.0
  Ga  Ga5  1  0.366  0.264  0.612  1.0
  Se  Se6  1  0.194  0.296  0.908  1.0
  Se  Se7  1  0.806  0.704  0.092  1.0
  Se  Se8  1  0.296  0.194  0.408  1.0
  Se  Se9  1  0.704  0.806  0.592  1.0
  Se  Se10  1  0.765  0.304  0.398  1.0
  Se  Se11  1  0.235  0.696  0.602  1.0
  Se  Se12  1  0.304  0.765  0.898  1.0
  Se  Se13  1  0.696  0.235  0.102  1.0
  O  O14  1  0.688  0.656  0.054  1.0
  O  O15  1  0.312  0.344  0.946  1.0
  O  O16  1  0.656  0.688  0.554  1.0
  O  O17  1  0.344  0.312  0.446  1.0
  O  O18  1  0.762  0.623  0.729  1.0
  O  O19  1  0.238  0.377  0.271  1.0
  O  O20  1  0.623  0.762  0.229  1.0
  O  O21  1  0.377  0.238  0.771  1.0
  O  O22  1  0.978  0.465  0.156  1.0
  O  O23  1  0.022  0.535  0.844  1.0
  O  O24  1  0.465  0.978  0.656  1.0
  O  O25  1  0.535  0.022  0.344  1.0
  O  O26  1  0.794  0.362  0.958  1.0
  O  O27  1  0.206  0.638  0.042  1.0
  O  O28  1  0.362  0.794  0.458  1.0
  O  O29  1  0.638  0.206  0.542  1.0
  O  O30  1  0.777  0.440  0.445  1.0
  O  O31  1  0.223  0.560  0.555  1.0
  O  O32  1  0.440  0.777  0.945  1.0
  O  O33  1  0.560  0.223  0.055  1.0
  O  O34  1  0.992  0.100  0.378  1.0
  O  O35  1  0.008  0.900  0.622  1.0
  O  O36  1  0.100  0.992  0.878  1.0
  O  O37  1  0.900  0.008  0.122  1.0
  O  O38  1  0.115  0.275  0.673  1.0
  O  O39  1  0.885  0.725  0.327  1.0
  O  O40  1  0.275  0.115  0.173  1.0
  O  O41  1  0.725  0.885  0.827  1.0
[/CIF]
.
The structure described by CsGa2(Se2O7)2 crystallizes in the monoclinic C2/c space group. Cs(1) is bonded in a 12-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(4), two equivalent O(5), two equivalent O(6), and two equivalent O(7) atoms. Ga(1) is bonded in an octahedral geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(7) atom. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a distorted trigonal non-coplanar geometry to one O(1), one O(2), and one O(3) atom. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one O(4), one O(5), and one O(6) atom. There are seven inequivalent O sites. In the first O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one Ga(1), and one Se(1) atom. In the second O site, O(3) is bonded in a bent 120 degrees geometry to one Ga(1) and one Se(1) atom. In the third O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one Ga(1), and one Se(2) atom. In the fourth O site, O(5) is bonded in a bent 120 degrees geometry to one Cs(1), one Ga(1), and one Se(2) atom. In the fifth O site, O(6) is bonded in a distorted single-bond geometry to one Cs(1) and one Se(2) atom. In the sixth O site, O(7) is bonded in a distorted single-bond geometry to one Cs(1) and one Ga(1) atom. In the seventh O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one Ga(1), and one Se(1) atom. is represented by the CIF file [CIF]
data_CsGa2(Se2O7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.275
_cell_length_b   9.275
_cell_length_c   12.864
_cell_angle_alpha   58.716
_cell_angle_beta   58.716
_cell_angle_gamma   49.533
_symmetry_Int_Tables_number   1
_cell_volume   690.692
_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
  Cs  Cs0  1  0.757  0.243  0.750  1.0
  Cs  Cs1  1  0.243  0.757  0.250  1.0
  Ga  Ga2  1  0.736  0.634  0.888  1.0
  Ga  Ga3  1  0.264  0.366  0.112  1.0
  Ga  Ga4  1  0.634  0.736  0.388  1.0
  Ga  Ga5  1  0.366  0.264  0.612  1.0
  Se  Se6  1  0.194  0.296  0.908  1.0
  Se  Se7  1  0.806  0.704  0.092  1.0
  Se  Se8  1  0.296  0.194  0.408  1.0
  Se  Se9  1  0.704  0.806  0.592  1.0
  Se  Se10  1  0.765  0.304  0.398  1.0
  Se  Se11  1  0.235  0.696  0.602  1.0
  Se  Se12  1  0.304  0.765  0.898  1.0
  Se  Se13  1  0.696  0.235  0.102  1.0
  O  O14  1  0.688  0.656  0.054  1.0
  O  O15  1  0.312  0.344  0.946  1.0
  O  O16  1  0.656  0.688  0.554  1.0
  O  O17  1  0.344  0.312  0.446  1.0
  O  O18  1  0.762  0.623  0.729  1.0
  O  O19  1  0.238  0.377  0.271  1.0
  O  O20  1  0.623  0.762  0.229  1.0
  O  O21  1  0.377  0.238  0.771  1.0
  O  O22  1  0.978  0.465  0.156  1.0
  O  O23  1  0.022  0.535  0.844  1.0
  O  O24  1  0.465  0.978  0.656  1.0
  O  O25  1  0.535  0.022  0.344  1.0
  O  O26  1  0.794  0.362  0.958  1.0
  O  O27  1  0.206  0.638  0.042  1.0
  O  O28  1  0.362  0.794  0.458  1.0
  O  O29  1  0.638  0.206  0.542  1.0
  O  O30  1  0.777  0.440  0.445  1.0
  O  O31  1  0.223  0.560  0.555  1.0
  O  O32  1  0.440  0.777  0.945  1.0
  O  O33  1  0.560  0.223  0.055  1.0
  O  O34  1  0.992  0.100  0.378  1.0
  O  O35  1  0.008  0.900  0.622  1.0
  O  O36  1  0.100  0.992  0.878  1.0
  O  O37  1  0.900  0.008  0.122  1.0
  O  O38  1  0.115  0.275  0.673  1.0
  O  O39  1  0.885  0.725  0.327  1.0
  O  O40  1  0.275  0.115  0.173  1.0
  O  O41  1  0.725  0.885  0.827  1.0
[/CIF]
.