The compound described by SrNiO2 crystallizes in the orthorhombic Cmcm space group. Sr(1) is bonded in a 7-coordinate geometry to two equivalent O(2) and five equivalent O(1) atoms. Ni(1) is bonded in a square co-planar geometry to one O(1) and three equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded to five equivalent Sr(1) and one Ni(1) atom to form distorted OSr5Ni octahedra that share corners with four equivalent O(1)Sr5Ni octahedra, corners with seven equivalent O(2)Sr2Ni3 trigonal bipyramids, edges with eight equivalent O(1)Sr5Ni octahedra, and faces with two equivalent O(2)Sr2Ni3 trigonal bipyramids. The corner-sharing octahedral tilt angles are 8°. In the second O site, O(2) is bonded to two equivalent Sr(1) and three equivalent Ni(1) atoms to form OSr2Ni3 trigonal bipyramids that share corners with seven equivalent O(1)Sr5Ni octahedra, corners with four equivalent O(2)Sr2Ni3 trigonal bipyramids, edges with two equivalent O(2)Sr2Ni3 trigonal bipyramids, and faces with two equivalent O(1)Sr5Ni octahedra. The corner-sharing octahedral tilt angles range from 0-59°. is represented by the Crystallographic Information File (CIF) [CIF]
data_SrNiO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.597
_cell_length_b   4.060
_cell_length_c   8.364
_cell_angle_alpha   90.000
_cell_angle_beta   102.417
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   119.271
_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
  Sr  Sr0  1  0.332  0.750  0.663  1.0
  Sr  Sr1  1  0.668  0.250  0.337  1.0
  Ni  Ni2  1  0.061  0.750  0.123  1.0
  Ni  Ni3  1  0.939  0.250  0.877  1.0
  O  O4  1  0.179  0.750  0.359  1.0
  O  O5  1  0.821  0.250  0.641  1.0
  O  O6  1  0.944  0.750  0.888  1.0
  O  O7  1  0.056  0.250  0.112  1.0
[/CIF]
.
The compound described by SrNiO2 crystallizes in the orthorhombic Cmcm space group. Sr(1) is bonded in a 7-coordinate geometry to two equivalent O(2) and five equivalent O(1) atoms. Ni(1) is bonded in a square co-planar geometry to one O(1) and three equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded to five equivalent Sr(1) and one Ni(1) atom to form distorted OSr5Ni octahedra that share corners with four equivalent O(1)Sr5Ni octahedra, corners with seven equivalent O(2)Sr2Ni3 trigonal bipyramids, edges with eight equivalent O(1)Sr5Ni octahedra, and faces with two equivalent O(2)Sr2Ni3 trigonal bipyramids. The corner-sharing octahedral tilt angles are 8°. In the second O site, O(2) is bonded to two equivalent Sr(1) and three equivalent Ni(1) atoms to form OSr2Ni3 trigonal bipyramids that share corners with seven equivalent O(1)Sr5Ni octahedra, corners with four equivalent O(2)Sr2Ni3 trigonal bipyramids, edges with two equivalent O(2)Sr2Ni3 trigonal bipyramids, and faces with two equivalent O(1)Sr5Ni octahedra. The corner-sharing octahedral tilt angles range from 0-59°. is represented by the Crystallographic Information File (CIF) [CIF]
data_SrNiO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.597
_cell_length_b   4.060
_cell_length_c   8.364
_cell_angle_alpha   90.000
_cell_angle_beta   102.417
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   119.271
_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
  Sr  Sr0  1  0.332  0.750  0.663  1.0
  Sr  Sr1  1  0.668  0.250  0.337  1.0
  Ni  Ni2  1  0.061  0.750  0.123  1.0
  Ni  Ni3  1  0.939  0.250  0.877  1.0
  O  O4  1  0.179  0.750  0.359  1.0
  O  O5  1  0.821  0.250  0.641  1.0
  O  O6  1  0.944  0.750  0.888  1.0
  O  O7  1  0.056  0.250  0.112  1.0
[/CIF]
.