The material structure described by Na4UCr3O14 crystallizes in the triclinic P-1 space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded in a 7-coordinate geometry to one O(10), one O(13), one O(2), one O(3), one O(4), one O(6), and one O(7) atom. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(12), one O(14), one O(7), one O(9), and two equivalent O(5) atoms. In the third Na site, Na(3) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(11), one O(13), one O(14), and one O(4) atom. In the fourth Na site, Na(4) is bonded in a 6-coordinate geometry to one O(12), one O(2), one O(5), one O(6), one O(7), and one O(8) atom. U(1) is bonded to one O(1), one O(11), one O(13), one O(3), one O(6), one O(8), and one O(9) atom to form distorted UO7 pentagonal bipyramids that share  a cornercorner with one Cr(1)O4 tetrahedra, corners with two equivalent Cr(2)O4 tetrahedra, and corners with two equivalent Cr(3)O4 tetrahedra. There are three inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(11), one O(12), one O(4), and one O(7) atom to form CrO4 tetrahedra that share  a cornercorner with one U(1)O7 pentagonal bipyramid. In the second Cr site, Cr(2) is bonded to one O(1), one O(10), one O(14), and one O(3) atom to form CrO4 tetrahedra that share corners with two equivalent U(1)O7 pentagonal bipyramids. In the third Cr site, Cr(3) is bonded to one O(2), one O(5), one O(8), and one O(9) atom to form CrO4 tetrahedra that share corners with two equivalent U(1)O7 pentagonal bipyramids. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Na(3), one U(1), and one Cr(2) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Na(1), one Na(4), and one Cr(3) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Na(1), one U(1), and one Cr(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Na(1), one Na(3), and one Cr(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Na(4), two equivalent Na(2), and one Cr(3) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Na(1), one Na(4), and one U(1) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Na(4), and one Cr(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Na(4), one U(1), and one Cr(3) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Na(2), one U(1), and one Cr(3) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Na(1), one Na(3), and one Cr(2) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Na(3), one U(1), and one Cr(1) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Na(2), one Na(4), and one Cr(1) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Na(1), one Na(3), and one U(1) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal non-coplanar geometry to one Na(2), one Na(3), and one Cr(2) atom. is represented by the CIF card [CIF]
data_Na4UCr3O14
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.335
_cell_length_b   8.644
_cell_length_c   11.631
_cell_angle_alpha   80.072
_cell_angle_beta   78.743
_cell_angle_gamma   69.080
_symmetry_Int_Tables_number   1
_cell_volume   671.369
_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
  Na  Na0  1  0.777  0.536  0.788  1.0
  Na  Na1  1  0.223  0.464  0.212  1.0
  Na  Na2  1  0.044  0.909  0.674  1.0
  Na  Na3  1  0.661  0.149  0.956  1.0
  Na  Na4  1  0.339  0.851  0.044  1.0
  Na  Na5  1  0.736  0.779  0.485  1.0
  Na  Na6  1  0.956  0.091  0.326  1.0
  Na  Na7  1  0.264  0.221  0.515  1.0
  U  U8  1  0.319  0.381  0.767  1.0
  U  U9  1  0.681  0.619  0.233  1.0
  Cr  Cr10  1  0.518  0.922  0.741  1.0
  Cr  Cr11  1  0.984  0.734  0.955  1.0
  Cr  Cr12  1  0.254  0.661  0.475  1.0
  Cr  Cr13  1  0.482  0.078  0.259  1.0
  Cr  Cr14  1  0.016  0.266  0.045  1.0
  Cr  Cr15  1  0.746  0.339  0.525  1.0
  O  O16  1  0.232  0.273  0.965  1.0
  O  O17  1  0.769  0.495  0.577  1.0
  O  O18  1  0.942  0.402  0.148  1.0
  O  O19  1  0.467  0.787  0.849  1.0
  O  O20  1  0.935  0.170  0.551  1.0
  O  O21  1  0.065  0.830  0.449  1.0
  O  O22  1  0.058  0.598  0.852  1.0
  O  O23  1  0.130  0.333  0.711  1.0
  O  O24  1  0.747  0.834  0.677  1.0
  O  O25  1  0.533  0.307  0.592  1.0
  O  O26  1  0.256  0.623  0.622  1.0
  O  O27  1  0.148  0.684  0.044  1.0
  O  O28  1  0.744  0.377  0.378  1.0
  O  O29  1  0.870  0.667  0.289  1.0
  O  O30  1  0.467  0.693  0.408  1.0
  O  O31  1  0.768  0.727  0.035  1.0
  O  O32  1  0.253  0.166  0.323  1.0
  O  O33  1  0.498  0.098  0.800  1.0
  O  O34  1  0.365  0.966  0.643  1.0
  O  O35  1  0.514  0.420  0.823  1.0
  O  O36  1  0.635  0.034  0.357  1.0
  O  O37  1  0.486  0.580  0.177  1.0
  O  O38  1  0.502  0.902  0.200  1.0
  O  O39  1  0.048  0.076  0.113  1.0
  O  O40  1  0.952  0.924  0.887  1.0
  O  O41  1  0.852  0.316  0.956  1.0
  O  O42  1  0.533  0.213  0.151  1.0
  O  O43  1  0.231  0.505  0.423  1.0
[/CIF]
.
The material structure described by Na4UCr3O14 crystallizes in the triclinic P-1 space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded in a 7-coordinate geometry to one O(10), one O(13), one O(2), one O(3), one O(4), one O(6), and one O(7) atom. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(12), one O(14), one O(7), one O(9), and two equivalent O(5) atoms. In the third Na site, Na(3) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(11), one O(13), one O(14), and one O(4) atom. In the fourth Na site, Na(4) is bonded in a 6-coordinate geometry to one O(12), one O(2), one O(5), one O(6), one O(7), and one O(8) atom. U(1) is bonded to one O(1), one O(11), one O(13), one O(3), one O(6), one O(8), and one O(9) atom to form distorted UO7 pentagonal bipyramids that share  a cornercorner with one Cr(1)O4 tetrahedra, corners with two equivalent Cr(2)O4 tetrahedra, and corners with two equivalent Cr(3)O4 tetrahedra. There are three inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(11), one O(12), one O(4), and one O(7) atom to form CrO4 tetrahedra that share  a cornercorner with one U(1)O7 pentagonal bipyramid. In the second Cr site, Cr(2) is bonded to one O(1), one O(10), one O(14), and one O(3) atom to form CrO4 tetrahedra that share corners with two equivalent U(1)O7 pentagonal bipyramids. In the third Cr site, Cr(3) is bonded to one O(2), one O(5), one O(8), and one O(9) atom to form CrO4 tetrahedra that share corners with two equivalent U(1)O7 pentagonal bipyramids. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Na(3), one U(1), and one Cr(2) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Na(1), one Na(4), and one Cr(3) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Na(1), one U(1), and one Cr(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Na(1), one Na(3), and one Cr(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Na(4), two equivalent Na(2), and one Cr(3) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Na(1), one Na(4), and one U(1) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Na(4), and one Cr(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Na(4), one U(1), and one Cr(3) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Na(2), one U(1), and one Cr(3) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Na(1), one Na(3), and one Cr(2) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Na(3), one U(1), and one Cr(1) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Na(2), one Na(4), and one Cr(1) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Na(1), one Na(3), and one U(1) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal non-coplanar geometry to one Na(2), one Na(3), and one Cr(2) atom. is represented by the CIF card [CIF]
data_Na4UCr3O14
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.335
_cell_length_b   8.644
_cell_length_c   11.631
_cell_angle_alpha   80.072
_cell_angle_beta   78.743
_cell_angle_gamma   69.080
_symmetry_Int_Tables_number   1
_cell_volume   671.369
_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
  Na  Na0  1  0.777  0.536  0.788  1.0
  Na  Na1  1  0.223  0.464  0.212  1.0
  Na  Na2  1  0.044  0.909  0.674  1.0
  Na  Na3  1  0.661  0.149  0.956  1.0
  Na  Na4  1  0.339  0.851  0.044  1.0
  Na  Na5  1  0.736  0.779  0.485  1.0
  Na  Na6  1  0.956  0.091  0.326  1.0
  Na  Na7  1  0.264  0.221  0.515  1.0
  U  U8  1  0.319  0.381  0.767  1.0
  U  U9  1  0.681  0.619  0.233  1.0
  Cr  Cr10  1  0.518  0.922  0.741  1.0
  Cr  Cr11  1  0.984  0.734  0.955  1.0
  Cr  Cr12  1  0.254  0.661  0.475  1.0
  Cr  Cr13  1  0.482  0.078  0.259  1.0
  Cr  Cr14  1  0.016  0.266  0.045  1.0
  Cr  Cr15  1  0.746  0.339  0.525  1.0
  O  O16  1  0.232  0.273  0.965  1.0
  O  O17  1  0.769  0.495  0.577  1.0
  O  O18  1  0.942  0.402  0.148  1.0
  O  O19  1  0.467  0.787  0.849  1.0
  O  O20  1  0.935  0.170  0.551  1.0
  O  O21  1  0.065  0.830  0.449  1.0
  O  O22  1  0.058  0.598  0.852  1.0
  O  O23  1  0.130  0.333  0.711  1.0
  O  O24  1  0.747  0.834  0.677  1.0
  O  O25  1  0.533  0.307  0.592  1.0
  O  O26  1  0.256  0.623  0.622  1.0
  O  O27  1  0.148  0.684  0.044  1.0
  O  O28  1  0.744  0.377  0.378  1.0
  O  O29  1  0.870  0.667  0.289  1.0
  O  O30  1  0.467  0.693  0.408  1.0
  O  O31  1  0.768  0.727  0.035  1.0
  O  O32  1  0.253  0.166  0.323  1.0
  O  O33  1  0.498  0.098  0.800  1.0
  O  O34  1  0.365  0.966  0.643  1.0
  O  O35  1  0.514  0.420  0.823  1.0
  O  O36  1  0.635  0.034  0.357  1.0
  O  O37  1  0.486  0.580  0.177  1.0
  O  O38  1  0.502  0.902  0.200  1.0
  O  O39  1  0.048  0.076  0.113  1.0
  O  O40  1  0.952  0.924  0.887  1.0
  O  O41  1  0.852  0.316  0.956  1.0
  O  O42  1  0.533  0.213  0.151  1.0
  O  O43  1  0.231  0.505  0.423  1.0
[/CIF]
.