The compound described by TmNiO3 is Orthorhombic Perovskite structured and crystallizes in the orthorhombic Pnma space group. Tm(1) is bonded in a 8-coordinate geometry to two equivalent O(1) and six equivalent O(2) atoms. Ni(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form corner-sharing NiO6 octahedra. The corner-sharing octahedral tilt angles range from 35-36°. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Tm(1) and two equivalent Ni(1) atoms to form distorted corner-sharing OTm2Ni2 trigonal pyramids. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent Tm(1) and two equivalent Ni(1) atoms. is represented by the CIF card [CIF]
data_TmNiO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.081
_cell_length_b   5.491
_cell_length_c   7.304
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   203.776
_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
  Tm  Tm0  1  0.523  0.580  0.750  1.0
  Tm  Tm1  1  0.023  0.920  0.250  1.0
  Tm  Tm2  1  0.477  0.420  0.250  1.0
  Tm  Tm3  1  0.977  0.080  0.750  1.0
  Ni  Ni4  1  0.000  0.500  0.000  1.0
  Ni  Ni5  1  0.500  0.000  0.500  1.0
  Ni  Ni6  1  0.000  0.500  0.500  1.0
  Ni  Ni7  1  0.500  0.000  0.000  1.0
  O  O8  1  0.391  0.966  0.750  1.0
  O  O9  1  0.891  0.534  0.250  1.0
  O  O10  1  0.609  0.034  0.250  1.0
  O  O11  1  0.109  0.466  0.750  1.0
  O  O12  1  0.809  0.807  0.946  1.0
  O  O13  1  0.309  0.693  0.446  1.0
  O  O14  1  0.191  0.193  0.054  1.0
  O  O15  1  0.691  0.307  0.554  1.0
  O  O16  1  0.309  0.693  0.054  1.0
  O  O17  1  0.809  0.807  0.554  1.0
  O  O18  1  0.691  0.307  0.946  1.0
  O  O19  1  0.191  0.193  0.446  1.0
[/CIF]
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The compound described by TmNiO3 is Orthorhombic Perovskite structured and crystallizes in the orthorhombic Pnma space group. Tm(1) is bonded in a 8-coordinate geometry to two equivalent O(1) and six equivalent O(2) atoms. Ni(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form corner-sharing NiO6 octahedra. The corner-sharing octahedral tilt angles range from 35-36°. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Tm(1) and two equivalent Ni(1) atoms to form distorted corner-sharing OTm2Ni2 trigonal pyramids. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent Tm(1) and two equivalent Ni(1) atoms. is represented by the CIF card [CIF]
data_TmNiO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.081
_cell_length_b   5.491
_cell_length_c   7.304
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   203.776
_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
  Tm  Tm0  1  0.523  0.580  0.750  1.0
  Tm  Tm1  1  0.023  0.920  0.250  1.0
  Tm  Tm2  1  0.477  0.420  0.250  1.0
  Tm  Tm3  1  0.977  0.080  0.750  1.0
  Ni  Ni4  1  0.000  0.500  0.000  1.0
  Ni  Ni5  1  0.500  0.000  0.500  1.0
  Ni  Ni6  1  0.000  0.500  0.500  1.0
  Ni  Ni7  1  0.500  0.000  0.000  1.0
  O  O8  1  0.391  0.966  0.750  1.0
  O  O9  1  0.891  0.534  0.250  1.0
  O  O10  1  0.609  0.034  0.250  1.0
  O  O11  1  0.109  0.466  0.750  1.0
  O  O12  1  0.809  0.807  0.946  1.0
  O  O13  1  0.309  0.693  0.446  1.0
  O  O14  1  0.191  0.193  0.054  1.0
  O  O15  1  0.691  0.307  0.554  1.0
  O  O16  1  0.309  0.693  0.054  1.0
  O  O17  1  0.809  0.807  0.554  1.0
  O  O18  1  0.691  0.307  0.946  1.0
  O  O19  1  0.191  0.193  0.446  1.0
[/CIF]
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