The crystal structure described by Cs2LaN5O17 crystallizes in the monoclinic C2/c space group. Cs(1) is bonded to one O(1), one O(5), two equivalent O(2), two equivalent O(3), and two equivalent O(6) atoms to form distorted CsO8 hexagonal bipyramids that share corners with two equivalent La(1)O12 cuboctahedra, corners with four equivalent Cs(1)O8 hexagonal bipyramids,  an edgeedge with one La(1)O12 cuboctahedra, and  an edgeedge with one Cs(1)O8 hexagonal bipyramid. La(1) is bonded to two equivalent O(1), two equivalent O(3), two equivalent O(4), two equivalent O(5), two equivalent O(7), and two equivalent O(9) atoms to form LaO12 cuboctahedra that share corners with four equivalent Cs(1)O8 hexagonal bipyramids and edges with two equivalent Cs(1)O8 hexagonal bipyramids. There are three inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one O(4), one O(5), and one O(6) atom. In the third N site, N(3) is bonded in a trigonal planar geometry to one O(8) and two equivalent O(7) atoms. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Cs(1), one La(1), and one N(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent Cs(1) and one N(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent Cs(1), one La(1), and one N(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one La(1) and one N(2) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Cs(1), one La(1), and one N(2) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to two equivalent Cs(1) and one N(2) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one La(1) and one N(3) atom. In the eighth O site, O(8) is bonded in a single-bond geometry to one N(3) atom. In the ninth O site, O(9) is bonded in a single-bond geometry to one La(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Cs2LaN5O17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.481
_cell_length_b   10.481
_cell_length_c   10.797
_cell_angle_alpha   70.329
_cell_angle_beta   70.329
_cell_angle_gamma   51.756
_symmetry_Int_Tables_number   1
_cell_volume   863.930
_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  0.916  0.576  0.207  1.0
  Cs  Cs1  1  0.424  0.084  0.293  1.0
  Cs  Cs2  1  0.084  0.424  0.793  1.0
  Cs  Cs3  1  0.576  0.916  0.707  1.0
  La  La4  1  0.240  0.760  0.250  1.0
  La  La5  1  0.760  0.240  0.750  1.0
  N  N6  1  0.203  0.471  0.429  1.0
  N  N7  1  0.529  0.797  0.071  1.0
  N  N8  1  0.797  0.529  0.571  1.0
  N  N9  1  0.471  0.203  0.929  1.0
  N  N10  1  0.926  0.862  0.858  1.0
  N  N11  1  0.138  0.074  0.642  1.0
  N  N12  1  0.074  0.138  0.142  1.0
  N  N13  1  0.862  0.926  0.358  1.0
  N  N14  1  0.415  0.585  0.750  1.0
  N  N15  1  0.585  0.415  0.250  1.0
  O  O16  1  0.165  0.586  0.479  1.0
  O  O17  1  0.414  0.835  0.021  1.0
  O  O18  1  0.835  0.414  0.521  1.0
  O  O19  1  0.586  0.165  0.979  1.0
  O  O20  1  0.211  0.345  0.500  1.0
  O  O21  1  0.655  0.789  1.000  1.0
  O  O22  1  0.789  0.655  0.500  1.0
  O  O23  1  0.345  0.211  0.000  1.0
  O  O24  1  0.236  0.485  0.301  1.0
  O  O25  1  0.515  0.764  0.199  1.0
  O  O26  1  0.764  0.515  0.699  1.0
  O  O27  1  0.485  0.236  0.801  1.0
  O  O28  1  0.946  0.945  0.403  1.0
  O  O29  1  0.055  0.054  0.097  1.0
  O  O30  1  0.054  0.055  0.597  1.0
  O  O31  1  0.945  0.946  0.903  1.0
  O  O32  1  0.938  0.838  0.265  1.0
  O  O33  1  0.162  0.062  0.235  1.0
  O  O34  1  0.062  0.162  0.735  1.0
  O  O35  1  0.838  0.938  0.765  1.0
  O  O36  1  0.987  0.713  0.902  1.0
  O  O37  1  0.287  0.013  0.598  1.0
  O  O38  1  0.013  0.287  0.098  1.0
  O  O39  1  0.713  0.987  0.402  1.0
  O  O40  1  0.479  0.503  0.856  1.0
  O  O41  1  0.497  0.521  0.644  1.0
  O  O42  1  0.521  0.497  0.144  1.0
  O  O43  1  0.503  0.479  0.356  1.0
  O  O44  1  0.280  0.720  0.750  1.0
  O  O45  1  0.720  0.280  0.250  1.0
  O  O46  1  0.205  0.703  0.051  1.0
  O  O47  1  0.297  0.795  0.449  1.0
  O  O48  1  0.795  0.297  0.949  1.0
  O  O49  1  0.703  0.205  0.551  1.0
[/CIF]
.
The crystal structure described by Cs2LaN5O17 crystallizes in the monoclinic C2/c space group. Cs(1) is bonded to one O(1), one O(5), two equivalent O(2), two equivalent O(3), and two equivalent O(6) atoms to form distorted CsO8 hexagonal bipyramids that share corners with two equivalent La(1)O12 cuboctahedra, corners with four equivalent Cs(1)O8 hexagonal bipyramids,  an edgeedge with one La(1)O12 cuboctahedra, and  an edgeedge with one Cs(1)O8 hexagonal bipyramid. La(1) is bonded to two equivalent O(1), two equivalent O(3), two equivalent O(4), two equivalent O(5), two equivalent O(7), and two equivalent O(9) atoms to form LaO12 cuboctahedra that share corners with four equivalent Cs(1)O8 hexagonal bipyramids and edges with two equivalent Cs(1)O8 hexagonal bipyramids. There are three inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one O(4), one O(5), and one O(6) atom. In the third N site, N(3) is bonded in a trigonal planar geometry to one O(8) and two equivalent O(7) atoms. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Cs(1), one La(1), and one N(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent Cs(1) and one N(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent Cs(1), one La(1), and one N(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one La(1) and one N(2) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Cs(1), one La(1), and one N(2) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to two equivalent Cs(1) and one N(2) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one La(1) and one N(3) atom. In the eighth O site, O(8) is bonded in a single-bond geometry to one N(3) atom. In the ninth O site, O(9) is bonded in a single-bond geometry to one La(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Cs2LaN5O17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.481
_cell_length_b   10.481
_cell_length_c   10.797
_cell_angle_alpha   70.329
_cell_angle_beta   70.329
_cell_angle_gamma   51.756
_symmetry_Int_Tables_number   1
_cell_volume   863.930
_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  0.916  0.576  0.207  1.0
  Cs  Cs1  1  0.424  0.084  0.293  1.0
  Cs  Cs2  1  0.084  0.424  0.793  1.0
  Cs  Cs3  1  0.576  0.916  0.707  1.0
  La  La4  1  0.240  0.760  0.250  1.0
  La  La5  1  0.760  0.240  0.750  1.0
  N  N6  1  0.203  0.471  0.429  1.0
  N  N7  1  0.529  0.797  0.071  1.0
  N  N8  1  0.797  0.529  0.571  1.0
  N  N9  1  0.471  0.203  0.929  1.0
  N  N10  1  0.926  0.862  0.858  1.0
  N  N11  1  0.138  0.074  0.642  1.0
  N  N12  1  0.074  0.138  0.142  1.0
  N  N13  1  0.862  0.926  0.358  1.0
  N  N14  1  0.415  0.585  0.750  1.0
  N  N15  1  0.585  0.415  0.250  1.0
  O  O16  1  0.165  0.586  0.479  1.0
  O  O17  1  0.414  0.835  0.021  1.0
  O  O18  1  0.835  0.414  0.521  1.0
  O  O19  1  0.586  0.165  0.979  1.0
  O  O20  1  0.211  0.345  0.500  1.0
  O  O21  1  0.655  0.789  1.000  1.0
  O  O22  1  0.789  0.655  0.500  1.0
  O  O23  1  0.345  0.211  0.000  1.0
  O  O24  1  0.236  0.485  0.301  1.0
  O  O25  1  0.515  0.764  0.199  1.0
  O  O26  1  0.764  0.515  0.699  1.0
  O  O27  1  0.485  0.236  0.801  1.0
  O  O28  1  0.946  0.945  0.403  1.0
  O  O29  1  0.055  0.054  0.097  1.0
  O  O30  1  0.054  0.055  0.597  1.0
  O  O31  1  0.945  0.946  0.903  1.0
  O  O32  1  0.938  0.838  0.265  1.0
  O  O33  1  0.162  0.062  0.235  1.0
  O  O34  1  0.062  0.162  0.735  1.0
  O  O35  1  0.838  0.938  0.765  1.0
  O  O36  1  0.987  0.713  0.902  1.0
  O  O37  1  0.287  0.013  0.598  1.0
  O  O38  1  0.013  0.287  0.098  1.0
  O  O39  1  0.713  0.987  0.402  1.0
  O  O40  1  0.479  0.503  0.856  1.0
  O  O41  1  0.497  0.521  0.644  1.0
  O  O42  1  0.521  0.497  0.144  1.0
  O  O43  1  0.503  0.479  0.356  1.0
  O  O44  1  0.280  0.720  0.750  1.0
  O  O45  1  0.720  0.280  0.250  1.0
  O  O46  1  0.205  0.703  0.051  1.0
  O  O47  1  0.297  0.795  0.449  1.0
  O  O48  1  0.795  0.297  0.949  1.0
  O  O49  1  0.703  0.205  0.551  1.0
[/CIF]
.