The structure described by Ni2(SO4)3 crystallizes in the trigonal R-3 space group. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to three equivalent O(2) and three equivalent O(3) atoms to form NiO6 octahedra that share corners with six equivalent S(1)O4 tetrahedra. In the second Ni site, Ni(2) is bonded to three equivalent O(1) and three equivalent O(4) atoms to form NiO6 octahedra that share corners with six equivalent S(1)O4 tetrahedra. S(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SO4 tetrahedra that share corners with two equivalent Ni(1)O6 octahedra and corners with two equivalent Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 27-46°. There are four inequivalent O sites. In the first O site, O(2) is bonded in a bent 150 degrees geometry to one Ni(1) and one S(1) atom. In the second O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Ni(1) and one S(1) atom. In the third O site, O(4) is bonded in a bent 150 degrees geometry to one Ni(2) and one S(1) atom. In the fourth O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Ni(2) and one S(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ni2(SO4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.936
_cell_length_b   8.936
_cell_length_c   8.936
_cell_angle_alpha   55.399
_cell_angle_beta   55.399
_cell_angle_gamma   55.399
_symmetry_Int_Tables_number   1
_cell_volume   450.701
_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
  Ni  Ni0  1  0.143  0.143  0.143  1.0
  Ni  Ni1  1  0.348  0.348  0.348  1.0
  Ni  Ni2  1  0.652  0.652  0.652  1.0
  Ni  Ni3  1  0.857  0.857  0.857  1.0
  S  S4  1  0.746  0.043  0.459  1.0
  S  S5  1  0.957  0.541  0.254  1.0
  S  S6  1  0.541  0.254  0.957  1.0
  S  S7  1  0.459  0.746  0.043  1.0
  S  S8  1  0.043  0.459  0.746  1.0
  S  S9  1  0.254  0.957  0.541  1.0
  O  O10  1  0.528  0.216  0.150  1.0
  O  O11  1  0.216  0.150  0.528  1.0
  O  O12  1  0.796  0.018  0.605  1.0
  O  O13  1  0.871  0.131  0.259  1.0
  O  O14  1  0.150  0.528  0.216  1.0
  O  O15  1  0.741  0.129  0.869  1.0
  O  O16  1  0.982  0.395  0.204  1.0
  O  O17  1  0.538  0.169  0.492  1.0
  O  O18  1  0.831  0.508  0.462  1.0
  O  O19  1  0.395  0.204  0.982  1.0
  O  O20  1  0.869  0.741  0.129  1.0
  O  O21  1  0.508  0.462  0.831  1.0
  O  O22  1  0.492  0.538  0.169  1.0
  O  O23  1  0.131  0.259  0.871  1.0
  O  O24  1  0.605  0.796  0.018  1.0
  O  O25  1  0.169  0.492  0.538  1.0
  O  O26  1  0.462  0.831  0.508  1.0
  O  O27  1  0.018  0.605  0.796  1.0
  O  O28  1  0.259  0.871  0.131  1.0
  O  O29  1  0.850  0.472  0.784  1.0
  O  O30  1  0.129  0.869  0.741  1.0
  O  O31  1  0.204  0.982  0.395  1.0
  O  O32  1  0.784  0.850  0.472  1.0
  O  O33  1  0.472  0.784  0.850  1.0
[/CIF]
.
The structure described by Ni2(SO4)3 crystallizes in the trigonal R-3 space group. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to three equivalent O(2) and three equivalent O(3) atoms to form NiO6 octahedra that share corners with six equivalent S(1)O4 tetrahedra. In the second Ni site, Ni(2) is bonded to three equivalent O(1) and three equivalent O(4) atoms to form NiO6 octahedra that share corners with six equivalent S(1)O4 tetrahedra. S(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SO4 tetrahedra that share corners with two equivalent Ni(1)O6 octahedra and corners with two equivalent Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 27-46°. There are four inequivalent O sites. In the first O site, O(2) is bonded in a bent 150 degrees geometry to one Ni(1) and one S(1) atom. In the second O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Ni(1) and one S(1) atom. In the third O site, O(4) is bonded in a bent 150 degrees geometry to one Ni(2) and one S(1) atom. In the fourth O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Ni(2) and one S(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ni2(SO4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.936
_cell_length_b   8.936
_cell_length_c   8.936
_cell_angle_alpha   55.399
_cell_angle_beta   55.399
_cell_angle_gamma   55.399
_symmetry_Int_Tables_number   1
_cell_volume   450.701
_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
  Ni  Ni0  1  0.143  0.143  0.143  1.0
  Ni  Ni1  1  0.348  0.348  0.348  1.0
  Ni  Ni2  1  0.652  0.652  0.652  1.0
  Ni  Ni3  1  0.857  0.857  0.857  1.0
  S  S4  1  0.746  0.043  0.459  1.0
  S  S5  1  0.957  0.541  0.254  1.0
  S  S6  1  0.541  0.254  0.957  1.0
  S  S7  1  0.459  0.746  0.043  1.0
  S  S8  1  0.043  0.459  0.746  1.0
  S  S9  1  0.254  0.957  0.541  1.0
  O  O10  1  0.528  0.216  0.150  1.0
  O  O11  1  0.216  0.150  0.528  1.0
  O  O12  1  0.796  0.018  0.605  1.0
  O  O13  1  0.871  0.131  0.259  1.0
  O  O14  1  0.150  0.528  0.216  1.0
  O  O15  1  0.741  0.129  0.869  1.0
  O  O16  1  0.982  0.395  0.204  1.0
  O  O17  1  0.538  0.169  0.492  1.0
  O  O18  1  0.831  0.508  0.462  1.0
  O  O19  1  0.395  0.204  0.982  1.0
  O  O20  1  0.869  0.741  0.129  1.0
  O  O21  1  0.508  0.462  0.831  1.0
  O  O22  1  0.492  0.538  0.169  1.0
  O  O23  1  0.131  0.259  0.871  1.0
  O  O24  1  0.605  0.796  0.018  1.0
  O  O25  1  0.169  0.492  0.538  1.0
  O  O26  1  0.462  0.831  0.508  1.0
  O  O27  1  0.018  0.605  0.796  1.0
  O  O28  1  0.259  0.871  0.131  1.0
  O  O29  1  0.850  0.472  0.784  1.0
  O  O30  1  0.129  0.869  0.741  1.0
  O  O31  1  0.204  0.982  0.395  1.0
  O  O32  1  0.784  0.850  0.472  1.0
  O  O33  1  0.472  0.784  0.850  1.0
[/CIF]
.