The structure described by Na3Cr(Mo3O16)2 crystallizes in the triclinic P-1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted octahedral geometry to two equivalent O(10), two equivalent O(8), and two equivalent O(9) atoms. In the second Na site, Na(2) is bonded in a 7-coordinate geometry to one O(10), one O(13), one O(15), two equivalent O(11), and two equivalent O(16) atoms. There are three inequivalent Mo sites. In the first Mo site, Mo(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(4), one O(5), one O(8), and one O(9) atom. In the second Mo site, Mo(2) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(2), one O(3), one O(5), and one O(6) atom. In the third Mo site, Mo(3) is bonded in a 5-coordinate geometry to one O(1), one O(12), one O(4), one O(6), and one O(7) atom. Cr(1) is bonded in an octahedral geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Mo(1), one Mo(3), and one Cr(1) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Mo(1), one Mo(2), and one Cr(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to one Mo(2) and one Cr(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Mo(1) and one Mo(3) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Mo(1) and one Mo(2) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Mo(2) and one Mo(3) atom. In the seventh O site, O(7) is bonded in a single-bond geometry to one Mo(3) atom. In the eighth O site, O(8) is bonded in a distorted linear geometry to one Na(1) and one Mo(1) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one Na(1) and one Mo(1) atom. In the tenth O site, O(10) is bonded in a 2-coordinate geometry to one Na(1), one Na(2), and one Mo(2) atom. In the eleventh O site, O(11) is bonded in a distorted T-shaped geometry to two equivalent Na(2) and one Mo(2) atom. In the twelfth O site, O(12) is bonded in a single-bond geometry to one Mo(3) atom. In the thirteenth O site, O(13) is bonded in a bent 120 degrees geometry to one Na(2) and one O(14) atom. In the fourteenth O site, O(14) is bonded in a single-bond geometry to one O(13) atom. In the fifteenth O site, O(15) is bonded in a single-bond geometry to one Na(2) atom. In the sixteenth O site, O(16) is bonded in a 3-coordinate geometry to two equivalent Na(2) and one O(16) atom. is represented by the CIF card [CIF]
data_Na3Cr(Mo3O16)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.931
_cell_length_b   11.055
_cell_length_c   11.167
_cell_angle_alpha   115.829
_cell_angle_beta   84.947
_cell_angle_gamma   108.056
_symmetry_Int_Tables_number   1
_cell_volume   731.142
_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
  Na  Na0  1  0.500  0.000  0.500  1.0
  Na  Na1  1  0.200  0.557  0.416  1.0
  Na  Na2  1  0.800  0.443  0.584  1.0
  Cr  Cr3  1  0.000  0.000  0.000  1.0
  Mo  Mo4  1  0.981  0.922  0.276  1.0
  Mo  Mo5  1  0.019  0.078  0.724  1.0
  Mo  Mo6  1  0.805  0.182  0.278  1.0
  Mo  Mo7  1  0.195  0.818  0.722  1.0
  Mo  Mo8  1  0.808  0.259  0.015  1.0
  Mo  Mo9  1  0.192  0.741  0.985  1.0
  O  O10  1  0.170  0.954  0.097  1.0
  O  O11  1  0.830  0.046  0.903  1.0
  O  O12  1  0.811  0.977  0.136  1.0
  O  O13  1  0.189  0.023  0.864  1.0
  O  O14  1  0.065  0.180  0.109  1.0
  O  O15  1  0.935  0.820  0.891  1.0
  O  O16  1  0.973  0.755  0.112  1.0
  O  O17  1  0.027  0.245  0.888  1.0
  O  O18  1  0.010  0.120  0.333  1.0
  O  O19  1  0.990  0.880  0.667  1.0
  O  O20  1  0.668  0.189  0.142  1.0
  O  O21  1  0.332  0.811  0.858  1.0
  O  O22  1  0.392  0.743  0.066  1.0
  O  O23  1  0.608  0.257  0.934  1.0
  O  O24  1  0.177  0.933  0.371  1.0
  O  O25  1  0.823  0.067  0.629  1.0
  O  O26  1  0.756  0.864  0.343  1.0
  O  O27  1  0.244  0.136  0.657  1.0
  O  O28  1  0.610  0.147  0.379  1.0
  O  O29  1  0.390  0.853  0.621  1.0
  O  O30  1  0.933  0.363  0.372  1.0
  O  O31  1  0.067  0.637  0.628  1.0
  O  O32  1  0.923  0.436  0.125  1.0
  O  O33  1  0.077  0.564  0.875  1.0
  O  O34  1  0.440  0.448  0.216  1.0
  O  O35  1  0.560  0.552  0.784  1.0
  O  O36  1  0.517  0.515  0.151  1.0
  O  O37  1  0.483  0.485  0.849  1.0
  O  O38  1  0.148  0.631  0.258  1.0
  O  O39  1  0.852  0.369  0.742  1.0
  O  O40  1  0.568  0.550  0.498  1.0
  O  O41  1  0.432  0.450  0.502  1.0
[/CIF]
.
The structure described by Na3Cr(Mo3O16)2 crystallizes in the triclinic P-1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted octahedral geometry to two equivalent O(10), two equivalent O(8), and two equivalent O(9) atoms. In the second Na site, Na(2) is bonded in a 7-coordinate geometry to one O(10), one O(13), one O(15), two equivalent O(11), and two equivalent O(16) atoms. There are three inequivalent Mo sites. In the first Mo site, Mo(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(4), one O(5), one O(8), and one O(9) atom. In the second Mo site, Mo(2) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(2), one O(3), one O(5), and one O(6) atom. In the third Mo site, Mo(3) is bonded in a 5-coordinate geometry to one O(1), one O(12), one O(4), one O(6), and one O(7) atom. Cr(1) is bonded in an octahedral geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Mo(1), one Mo(3), and one Cr(1) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Mo(1), one Mo(2), and one Cr(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to one Mo(2) and one Cr(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Mo(1) and one Mo(3) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Mo(1) and one Mo(2) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Mo(2) and one Mo(3) atom. In the seventh O site, O(7) is bonded in a single-bond geometry to one Mo(3) atom. In the eighth O site, O(8) is bonded in a distorted linear geometry to one Na(1) and one Mo(1) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one Na(1) and one Mo(1) atom. In the tenth O site, O(10) is bonded in a 2-coordinate geometry to one Na(1), one Na(2), and one Mo(2) atom. In the eleventh O site, O(11) is bonded in a distorted T-shaped geometry to two equivalent Na(2) and one Mo(2) atom. In the twelfth O site, O(12) is bonded in a single-bond geometry to one Mo(3) atom. In the thirteenth O site, O(13) is bonded in a bent 120 degrees geometry to one Na(2) and one O(14) atom. In the fourteenth O site, O(14) is bonded in a single-bond geometry to one O(13) atom. In the fifteenth O site, O(15) is bonded in a single-bond geometry to one Na(2) atom. In the sixteenth O site, O(16) is bonded in a 3-coordinate geometry to two equivalent Na(2) and one O(16) atom. is represented by the CIF card [CIF]
data_Na3Cr(Mo3O16)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.931
_cell_length_b   11.055
_cell_length_c   11.167
_cell_angle_alpha   115.829
_cell_angle_beta   84.947
_cell_angle_gamma   108.056
_symmetry_Int_Tables_number   1
_cell_volume   731.142
_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
  Na  Na0  1  0.500  0.000  0.500  1.0
  Na  Na1  1  0.200  0.557  0.416  1.0
  Na  Na2  1  0.800  0.443  0.584  1.0
  Cr  Cr3  1  0.000  0.000  0.000  1.0
  Mo  Mo4  1  0.981  0.922  0.276  1.0
  Mo  Mo5  1  0.019  0.078  0.724  1.0
  Mo  Mo6  1  0.805  0.182  0.278  1.0
  Mo  Mo7  1  0.195  0.818  0.722  1.0
  Mo  Mo8  1  0.808  0.259  0.015  1.0
  Mo  Mo9  1  0.192  0.741  0.985  1.0
  O  O10  1  0.170  0.954  0.097  1.0
  O  O11  1  0.830  0.046  0.903  1.0
  O  O12  1  0.811  0.977  0.136  1.0
  O  O13  1  0.189  0.023  0.864  1.0
  O  O14  1  0.065  0.180  0.109  1.0
  O  O15  1  0.935  0.820  0.891  1.0
  O  O16  1  0.973  0.755  0.112  1.0
  O  O17  1  0.027  0.245  0.888  1.0
  O  O18  1  0.010  0.120  0.333  1.0
  O  O19  1  0.990  0.880  0.667  1.0
  O  O20  1  0.668  0.189  0.142  1.0
  O  O21  1  0.332  0.811  0.858  1.0
  O  O22  1  0.392  0.743  0.066  1.0
  O  O23  1  0.608  0.257  0.934  1.0
  O  O24  1  0.177  0.933  0.371  1.0
  O  O25  1  0.823  0.067  0.629  1.0
  O  O26  1  0.756  0.864  0.343  1.0
  O  O27  1  0.244  0.136  0.657  1.0
  O  O28  1  0.610  0.147  0.379  1.0
  O  O29  1  0.390  0.853  0.621  1.0
  O  O30  1  0.933  0.363  0.372  1.0
  O  O31  1  0.067  0.637  0.628  1.0
  O  O32  1  0.923  0.436  0.125  1.0
  O  O33  1  0.077  0.564  0.875  1.0
  O  O34  1  0.440  0.448  0.216  1.0
  O  O35  1  0.560  0.552  0.784  1.0
  O  O36  1  0.517  0.515  0.151  1.0
  O  O37  1  0.483  0.485  0.849  1.0
  O  O38  1  0.148  0.631  0.258  1.0
  O  O39  1  0.852  0.369  0.742  1.0
  O  O40  1  0.568  0.550  0.498  1.0
  O  O41  1  0.432  0.450  0.502  1.0
[/CIF]
.