The material described by LaTa2NO5 crystallizes in the monoclinic P2_1 space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(2), one O(4), one O(5), one O(6), one O(8), and one O(9) atom. In the second La site, La(2) is bonded in a 8-coordinate geometry to one N(1), one N(2), one O(1), one O(10), one O(2), one O(3), one O(7), and one O(9) atom. There are four inequivalent Ta sites. In the first Ta site, Ta(1) is bonded to one N(1), one O(1), one O(3), one O(4), one O(6), and one O(9) atom to form distorted TaNO5 octahedra that share corners with two equivalent Ta(3)N2O4 octahedra, corners with two equivalent Ta(2)O6 octahedra, and  an edgeedge with one Ta(4)NO5 octahedra. The corner-sharing octahedral tilt angles range from 27-48°. In the second Ta site, Ta(2) is bonded to one O(10), one O(2), one O(3), one O(4), one O(5), and one O(7) atom to form TaO6 octahedra that share corners with two equivalent Ta(1)NO5 octahedra, corners with two equivalent Ta(4)NO5 octahedra, and  an edgeedge with one Ta(3)N2O4 octahedra. The corner-sharing octahedral tilt angles range from 27-47°. In the third Ta site, Ta(3) is bonded to one N(1), one N(2), one O(10), one O(2), one O(6), and one O(8) atom to form TaN2O4 octahedra that share corners with two equivalent Ta(1)NO5 octahedra, corners with two equivalent Ta(4)NO5 octahedra, and  an edgeedge with one Ta(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-48°. In the fourth Ta site, Ta(4) is bonded to one N(2), one O(1), one O(5), one O(7), one O(8), and one O(9) atom to form TaNO5 octahedra that share corners with two equivalent Ta(3)N2O4 octahedra, corners with two equivalent Ta(2)O6 octahedra, and  an edgeedge with one Ta(1)NO5 octahedra. The corner-sharing octahedral tilt angles range from 29-47°. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 3-coordinate geometry to one La(2), one Ta(1), and one Ta(3) atom. In the second N site, N(2) is bonded in a 3-coordinate geometry to one La(2), one Ta(3), and one Ta(4) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one La(1), one La(2), one Ta(1), and one Ta(4) atom to form a mixture of distorted corner and edge-sharing OLa2Ta2 tetrahedra. In the second O site, O(2) is bonded to one La(1), one La(2), one Ta(2), and one Ta(3) atom to form a mixture of distorted corner and edge-sharing OLa2Ta2 trigonal pyramids. In the third O site, O(3) is bonded in a 3-coordinate geometry to one La(2), one Ta(1), and one Ta(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one La(1), one Ta(1), and one Ta(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one La(1), one Ta(2), and one Ta(4) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one La(1), one Ta(1), and one Ta(3) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one La(2), one Ta(2), and one Ta(4) atom. In the eighth O site, O(8) is bonded in a distorted trigonal non-coplanar geometry to one La(1), one Ta(3), and one Ta(4) atom. In the ninth O site, O(9) is bonded to one La(1), one La(2), one Ta(1), and one Ta(4) atom to form a mixture of distorted corner and edge-sharing OLa2Ta2 trigonal pyramids. In the tenth O site, O(10) is bonded to one La(1), one La(2), one Ta(2), and one Ta(3) atom to form a mixture of distorted corner and edge-sharing OLa2Ta2 tetrahedra. is represented by the CIF card [CIF]
data_LaTa2NO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.316
_cell_length_b   5.533
_cell_length_c   7.730
_cell_angle_alpha   89.883
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   484.012
_cell_formula_units_Z   4
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
  La  La0  1  0.036  0.797  0.500  1.0
  La  La1  1  0.456  0.296  0.998  1.0
  La  La2  1  0.536  0.203  0.500  1.0
  La  La3  1  0.956  0.704  0.002  1.0
  Ta  Ta4  1  0.149  0.288  0.756  1.0
  Ta  Ta5  1  0.142  0.294  0.247  1.0
  Ta  Ta6  1  0.353  0.797  0.753  1.0
  Ta  Ta7  1  0.360  0.782  0.246  1.0
  Ta  Ta8  1  0.642  0.706  0.753  1.0
  Ta  Ta9  1  0.649  0.712  0.244  1.0
  Ta  Ta10  1  0.853  0.203  0.247  1.0
  Ta  Ta11  1  0.860  0.218  0.754  1.0
  N  N12  1  0.291  0.123  0.804  1.0
  N  N13  1  0.356  0.701  0.001  1.0
  N  N14  1  0.791  0.877  0.196  1.0
  N  N15  1  0.856  0.299  0.999  1.0
  O  O16  1  0.024  0.026  0.783  1.0
  O  O17  1  0.027  0.023  0.216  1.0
  O  O18  1  0.122  0.400  0.001  1.0
  O  O19  1  0.142  0.205  0.499  1.0
  O  O20  1  0.211  0.617  0.309  1.0
  O  O21  1  0.209  0.619  0.691  1.0
  O  O22  1  0.287  0.120  0.199  1.0
  O  O23  1  0.380  0.899  0.499  1.0
  O  O24  1  0.473  0.512  0.288  1.0
  O  O25  1  0.481  0.521  0.713  1.0
  O  O26  1  0.527  0.977  0.784  1.0
  O  O27  1  0.524  0.974  0.217  1.0
  O  O28  1  0.622  0.600  0.999  1.0
  O  O29  1  0.642  0.795  0.501  1.0
  O  O30  1  0.709  0.381  0.309  1.0
  O  O31  1  0.711  0.383  0.691  1.0
  O  O32  1  0.787  0.880  0.801  1.0
  O  O33  1  0.880  0.101  0.501  1.0
  O  O34  1  0.981  0.479  0.287  1.0
  O  O35  1  0.973  0.488  0.712  1.0
[/CIF]
.
The material described by LaTa2NO5 crystallizes in the monoclinic P2_1 space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(2), one O(4), one O(5), one O(6), one O(8), and one O(9) atom. In the second La site, La(2) is bonded in a 8-coordinate geometry to one N(1), one N(2), one O(1), one O(10), one O(2), one O(3), one O(7), and one O(9) atom. There are four inequivalent Ta sites. In the first Ta site, Ta(1) is bonded to one N(1), one O(1), one O(3), one O(4), one O(6), and one O(9) atom to form distorted TaNO5 octahedra that share corners with two equivalent Ta(3)N2O4 octahedra, corners with two equivalent Ta(2)O6 octahedra, and  an edgeedge with one Ta(4)NO5 octahedra. The corner-sharing octahedral tilt angles range from 27-48°. In the second Ta site, Ta(2) is bonded to one O(10), one O(2), one O(3), one O(4), one O(5), and one O(7) atom to form TaO6 octahedra that share corners with two equivalent Ta(1)NO5 octahedra, corners with two equivalent Ta(4)NO5 octahedra, and  an edgeedge with one Ta(3)N2O4 octahedra. The corner-sharing octahedral tilt angles range from 27-47°. In the third Ta site, Ta(3) is bonded to one N(1), one N(2), one O(10), one O(2), one O(6), and one O(8) atom to form TaN2O4 octahedra that share corners with two equivalent Ta(1)NO5 octahedra, corners with two equivalent Ta(4)NO5 octahedra, and  an edgeedge with one Ta(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-48°. In the fourth Ta site, Ta(4) is bonded to one N(2), one O(1), one O(5), one O(7), one O(8), and one O(9) atom to form TaNO5 octahedra that share corners with two equivalent Ta(3)N2O4 octahedra, corners with two equivalent Ta(2)O6 octahedra, and  an edgeedge with one Ta(1)NO5 octahedra. The corner-sharing octahedral tilt angles range from 29-47°. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 3-coordinate geometry to one La(2), one Ta(1), and one Ta(3) atom. In the second N site, N(2) is bonded in a 3-coordinate geometry to one La(2), one Ta(3), and one Ta(4) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one La(1), one La(2), one Ta(1), and one Ta(4) atom to form a mixture of distorted corner and edge-sharing OLa2Ta2 tetrahedra. In the second O site, O(2) is bonded to one La(1), one La(2), one Ta(2), and one Ta(3) atom to form a mixture of distorted corner and edge-sharing OLa2Ta2 trigonal pyramids. In the third O site, O(3) is bonded in a 3-coordinate geometry to one La(2), one Ta(1), and one Ta(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one La(1), one Ta(1), and one Ta(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one La(1), one Ta(2), and one Ta(4) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one La(1), one Ta(1), and one Ta(3) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one La(2), one Ta(2), and one Ta(4) atom. In the eighth O site, O(8) is bonded in a distorted trigonal non-coplanar geometry to one La(1), one Ta(3), and one Ta(4) atom. In the ninth O site, O(9) is bonded to one La(1), one La(2), one Ta(1), and one Ta(4) atom to form a mixture of distorted corner and edge-sharing OLa2Ta2 trigonal pyramids. In the tenth O site, O(10) is bonded to one La(1), one La(2), one Ta(2), and one Ta(3) atom to form a mixture of distorted corner and edge-sharing OLa2Ta2 tetrahedra. is represented by the CIF card [CIF]
data_LaTa2NO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.316
_cell_length_b   5.533
_cell_length_c   7.730
_cell_angle_alpha   89.883
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   484.012
_cell_formula_units_Z   4
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
  La  La0  1  0.036  0.797  0.500  1.0
  La  La1  1  0.456  0.296  0.998  1.0
  La  La2  1  0.536  0.203  0.500  1.0
  La  La3  1  0.956  0.704  0.002  1.0
  Ta  Ta4  1  0.149  0.288  0.756  1.0
  Ta  Ta5  1  0.142  0.294  0.247  1.0
  Ta  Ta6  1  0.353  0.797  0.753  1.0
  Ta  Ta7  1  0.360  0.782  0.246  1.0
  Ta  Ta8  1  0.642  0.706  0.753  1.0
  Ta  Ta9  1  0.649  0.712  0.244  1.0
  Ta  Ta10  1  0.853  0.203  0.247  1.0
  Ta  Ta11  1  0.860  0.218  0.754  1.0
  N  N12  1  0.291  0.123  0.804  1.0
  N  N13  1  0.356  0.701  0.001  1.0
  N  N14  1  0.791  0.877  0.196  1.0
  N  N15  1  0.856  0.299  0.999  1.0
  O  O16  1  0.024  0.026  0.783  1.0
  O  O17  1  0.027  0.023  0.216  1.0
  O  O18  1  0.122  0.400  0.001  1.0
  O  O19  1  0.142  0.205  0.499  1.0
  O  O20  1  0.211  0.617  0.309  1.0
  O  O21  1  0.209  0.619  0.691  1.0
  O  O22  1  0.287  0.120  0.199  1.0
  O  O23  1  0.380  0.899  0.499  1.0
  O  O24  1  0.473  0.512  0.288  1.0
  O  O25  1  0.481  0.521  0.713  1.0
  O  O26  1  0.527  0.977  0.784  1.0
  O  O27  1  0.524  0.974  0.217  1.0
  O  O28  1  0.622  0.600  0.999  1.0
  O  O29  1  0.642  0.795  0.501  1.0
  O  O30  1  0.709  0.381  0.309  1.0
  O  O31  1  0.711  0.383  0.691  1.0
  O  O32  1  0.787  0.880  0.801  1.0
  O  O33  1  0.880  0.101  0.501  1.0
  O  O34  1  0.981  0.479  0.287  1.0
  O  O35  1  0.973  0.488  0.712  1.0
[/CIF]
.