The material described by K2Cr2NiO10 crystallizes in the triclinic P-1 space group. K(1) is bonded in a 8-coordinate geometry to one O(2), one O(5), two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms. Cr(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form CrO4 tetrahedra that share corners with two equivalent Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-54°. Ni(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(5) atoms to form NiO6 octahedra that share corners with four equivalent Cr(1)O4 tetrahedra. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent K(1), one Cr(1), and one Ni(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one K(1), one Cr(1), and one Ni(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent K(1) and one Cr(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent K(1) and one Cr(1) atom. In the fifth O site, O(5) is bonded in a single-bond geometry to one K(1) and one Ni(1) atom. is represented by the CIF card [CIF]
data_K2Cr2NiO10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.515
_cell_length_b   6.599
_cell_length_c   7.534
_cell_angle_alpha   110.918
_cell_angle_beta   94.132
_cell_angle_gamma   106.547
_symmetry_Int_Tables_number   1
_cell_volume   240.858
_cell_formula_units_Z   1
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
  K  K0  1  0.291  0.679  0.264  1.0
  K  K1  1  0.709  0.321  0.736  1.0
  Cr  Cr2  1  0.361  0.704  0.775  1.0
  Cr  Cr3  1  0.639  0.296  0.225  1.0
  Ni  Ni4  1  0.000  0.000  0.000  1.0
  O  O5  1  0.135  0.737  0.918  1.0
  O  O6  1  0.865  0.263  0.082  1.0
  O  O7  1  0.644  0.757  0.920  1.0
  O  O8  1  0.356  0.243  0.080  1.0
  O  O9  1  0.393  0.874  0.659  1.0
  O  O10  1  0.607  0.126  0.341  1.0
  O  O11  1  0.267  0.436  0.623  1.0
  O  O12  1  0.733  0.564  0.377  1.0
  O  O13  1  0.969  0.994  0.766  1.0
  O  O14  1  0.031  0.006  0.234  1.0
[/CIF]
.
The material described by K2Cr2NiO10 crystallizes in the triclinic P-1 space group. K(1) is bonded in a 8-coordinate geometry to one O(2), one O(5), two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms. Cr(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form CrO4 tetrahedra that share corners with two equivalent Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-54°. Ni(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(5) atoms to form NiO6 octahedra that share corners with four equivalent Cr(1)O4 tetrahedra. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent K(1), one Cr(1), and one Ni(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one K(1), one Cr(1), and one Ni(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent K(1) and one Cr(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent K(1) and one Cr(1) atom. In the fifth O site, O(5) is bonded in a single-bond geometry to one K(1) and one Ni(1) atom. is represented by the CIF card [CIF]
data_K2Cr2NiO10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.515
_cell_length_b   6.599
_cell_length_c   7.534
_cell_angle_alpha   110.918
_cell_angle_beta   94.132
_cell_angle_gamma   106.547
_symmetry_Int_Tables_number   1
_cell_volume   240.858
_cell_formula_units_Z   1
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
  K  K0  1  0.291  0.679  0.264  1.0
  K  K1  1  0.709  0.321  0.736  1.0
  Cr  Cr2  1  0.361  0.704  0.775  1.0
  Cr  Cr3  1  0.639  0.296  0.225  1.0
  Ni  Ni4  1  0.000  0.000  0.000  1.0
  O  O5  1  0.135  0.737  0.918  1.0
  O  O6  1  0.865  0.263  0.082  1.0
  O  O7  1  0.644  0.757  0.920  1.0
  O  O8  1  0.356  0.243  0.080  1.0
  O  O9  1  0.393  0.874  0.659  1.0
  O  O10  1  0.607  0.126  0.341  1.0
  O  O11  1  0.267  0.436  0.623  1.0
  O  O12  1  0.733  0.564  0.377  1.0
  O  O13  1  0.969  0.994  0.766  1.0
  O  O14  1  0.031  0.006  0.234  1.0
[/CIF]
.