The structure described by La2Zn2O5 crystallizes in the orthorhombic Pnma space group. La(1) is bonded in a 8-coordinate geometry to one O(2), three equivalent O(1), and four equivalent O(3) atoms. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form ZnO6 octahedra that share corners with four equivalent Zn(1)O6 octahedra and corners with two equivalent Zn(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 16°. In the second Zn site, Zn(2) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form ZnO4 tetrahedra that share corners with two equivalent Zn(1)O6 octahedra and corners with two equivalent Zn(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 41°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to three equivalent La(1), one Zn(1), and one Zn(2) atom. In the second O site, O(2) is bonded to two equivalent La(1) and two equivalent Zn(2) atoms to form corner-sharing OLa2Zn2 tetrahedra. In the third O site, O(3) is bonded in a 6-coordinate geometry to four equivalent La(1) and two equivalent Zn(1) atoms. is represented by the CIF card [CIF]
data_La2Zn2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.535
_cell_length_b   5.820
_cell_length_c   15.859
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   510.921
_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  0.997  0.480  0.111  1.0
  La  La1  1  0.997  0.480  0.389  1.0
  La  La2  1  0.503  0.980  0.611  1.0
  La  La3  1  0.503  0.980  0.889  1.0
  La  La4  1  0.497  0.020  0.111  1.0
  La  La5  1  0.497  0.020  0.389  1.0
  La  La6  1  0.003  0.520  0.611  1.0
  La  La7  1  0.003  0.520  0.889  1.0
  Zn  Zn8  1  0.000  0.000  0.000  1.0
  Zn  Zn9  1  0.000  0.000  0.500  1.0
  Zn  Zn10  1  0.045  0.057  0.750  1.0
  Zn  Zn11  1  0.455  0.557  0.250  1.0
  Zn  Zn12  1  0.500  0.500  0.000  1.0
  Zn  Zn13  1  0.500  0.500  0.500  1.0
  Zn  Zn14  1  0.545  0.443  0.750  1.0
  Zn  Zn15  1  0.955  0.943  0.250  1.0
  O  O16  1  0.022  0.087  0.141  1.0
  O  O17  1  0.022  0.087  0.359  1.0
  O  O18  1  0.082  0.615  0.250  1.0
  O  O19  1  0.245  0.254  0.518  1.0
  O  O20  1  0.245  0.254  0.982  1.0
  O  O21  1  0.255  0.754  0.482  1.0
  O  O22  1  0.255  0.754  0.018  1.0
  O  O23  1  0.418  0.115  0.750  1.0
  O  O24  1  0.478  0.587  0.641  1.0
  O  O25  1  0.478  0.587  0.859  1.0
  O  O26  1  0.522  0.413  0.141  1.0
  O  O27  1  0.522  0.413  0.359  1.0
  O  O28  1  0.582  0.885  0.250  1.0
  O  O29  1  0.745  0.246  0.982  1.0
  O  O30  1  0.745  0.246  0.518  1.0
  O  O31  1  0.755  0.746  0.018  1.0
  O  O32  1  0.755  0.746  0.482  1.0
  O  O33  1  0.918  0.385  0.750  1.0
  O  O34  1  0.978  0.913  0.641  1.0
  O  O35  1  0.978  0.913  0.859  1.0
[/CIF]
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The structure described by La2Zn2O5 crystallizes in the orthorhombic Pnma space group. La(1) is bonded in a 8-coordinate geometry to one O(2), three equivalent O(1), and four equivalent O(3) atoms. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form ZnO6 octahedra that share corners with four equivalent Zn(1)O6 octahedra and corners with two equivalent Zn(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 16°. In the second Zn site, Zn(2) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form ZnO4 tetrahedra that share corners with two equivalent Zn(1)O6 octahedra and corners with two equivalent Zn(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 41°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to three equivalent La(1), one Zn(1), and one Zn(2) atom. In the second O site, O(2) is bonded to two equivalent La(1) and two equivalent Zn(2) atoms to form corner-sharing OLa2Zn2 tetrahedra. In the third O site, O(3) is bonded in a 6-coordinate geometry to four equivalent La(1) and two equivalent Zn(1) atoms. is represented by the CIF card [CIF]
data_La2Zn2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.535
_cell_length_b   5.820
_cell_length_c   15.859
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   510.921
_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  0.997  0.480  0.111  1.0
  La  La1  1  0.997  0.480  0.389  1.0
  La  La2  1  0.503  0.980  0.611  1.0
  La  La3  1  0.503  0.980  0.889  1.0
  La  La4  1  0.497  0.020  0.111  1.0
  La  La5  1  0.497  0.020  0.389  1.0
  La  La6  1  0.003  0.520  0.611  1.0
  La  La7  1  0.003  0.520  0.889  1.0
  Zn  Zn8  1  0.000  0.000  0.000  1.0
  Zn  Zn9  1  0.000  0.000  0.500  1.0
  Zn  Zn10  1  0.045  0.057  0.750  1.0
  Zn  Zn11  1  0.455  0.557  0.250  1.0
  Zn  Zn12  1  0.500  0.500  0.000  1.0
  Zn  Zn13  1  0.500  0.500  0.500  1.0
  Zn  Zn14  1  0.545  0.443  0.750  1.0
  Zn  Zn15  1  0.955  0.943  0.250  1.0
  O  O16  1  0.022  0.087  0.141  1.0
  O  O17  1  0.022  0.087  0.359  1.0
  O  O18  1  0.082  0.615  0.250  1.0
  O  O19  1  0.245  0.254  0.518  1.0
  O  O20  1  0.245  0.254  0.982  1.0
  O  O21  1  0.255  0.754  0.482  1.0
  O  O22  1  0.255  0.754  0.018  1.0
  O  O23  1  0.418  0.115  0.750  1.0
  O  O24  1  0.478  0.587  0.641  1.0
  O  O25  1  0.478  0.587  0.859  1.0
  O  O26  1  0.522  0.413  0.141  1.0
  O  O27  1  0.522  0.413  0.359  1.0
  O  O28  1  0.582  0.885  0.250  1.0
  O  O29  1  0.745  0.246  0.982  1.0
  O  O30  1  0.745  0.246  0.518  1.0
  O  O31  1  0.755  0.746  0.018  1.0
  O  O32  1  0.755  0.746  0.482  1.0
  O  O33  1  0.918  0.385  0.750  1.0
  O  O34  1  0.978  0.913  0.641  1.0
  O  O35  1  0.978  0.913  0.859  1.0
[/CIF]
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