The structure described by NaNi4F10 crystallizes in the monoclinic P2 space group. Na(1) is bonded to two equivalent F(2) and two equivalent F(8) atoms to form distorted NaF4 tetrahedra that share corners with two equivalent Ni(2)F6 octahedra, corners with two equivalent Ni(3)F6 octahedra, corners with two equivalent Na(1)F4 tetrahedra, and  an edgeedge with one Ni(4)F5 square pyramid. The corner-sharing octahedral tilt angles range from 57-67°. There are four inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to one F(7), two equivalent F(3), and two equivalent F(5) atoms to form distorted NiF5 square pyramids that share corners with two equivalent Ni(2)F6 octahedra, corners with two equivalent Ni(1)F5 square pyramids, and edges with two equivalent Ni(3)F6 octahedra. The corner-sharing octahedral tilt angles are 42°. In the second Ni site, Ni(2) is bonded to one F(1), one F(8), two equivalent F(3), and two equivalent F(4) atoms to form NiF6 octahedra that share corners with two equivalent Ni(2)F6 octahedra, corners with two equivalent Ni(1)F5 square pyramids, corners with two equivalent Na(1)F4 tetrahedra, and edges with two equivalent Ni(4)F5 square pyramids. The corner-sharing octahedral tilt angles are 22°. In the third Ni site, Ni(3) is bonded to one F(5), one F(6), two equivalent F(2), and two equivalent F(7) atoms to form NiF6 octahedra that share corners with two equivalent Ni(3)F6 octahedra, corners with two equivalent Ni(4)F5 square pyramids, corners with two equivalent Na(1)F4 tetrahedra, and edges with two equivalent Ni(1)F5 square pyramids. The corner-sharing octahedral tilt angles are 28°. In the fourth Ni site, Ni(4) is bonded to one F(4), two equivalent F(1), and two equivalent F(2) atoms to form NiF5 square pyramids that share corners with two equivalent Ni(3)F6 octahedra, corners with two equivalent Ni(4)F5 square pyramids, edges with two equivalent Ni(2)F6 octahedra, and  an edgeedge with one Na(1)F4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. There are eight inequivalent F sites. In the first F site, F(1) is bonded in a T-shaped geometry to one Ni(2) and two equivalent Ni(4) atoms. In the second F site, F(2) is bonded in a distorted trigonal planar geometry to one Na(1), one Ni(3), and one Ni(4) atom. In the third F site, F(3) is bonded in a bent 150 degrees geometry to one Ni(1) and one Ni(2) atom. In the fourth F site, F(4) is bonded in a distorted T-shaped geometry to one Ni(4) and two equivalent Ni(2) atoms. In the fifth F site, F(5) is bonded in a distorted T-shaped geometry to one Ni(3) and two equivalent Ni(1) atoms. In the sixth F site, F(6) is bonded in a single-bond geometry to one Ni(3) atom. In the seventh F site, F(7) is bonded in a distorted T-shaped geometry to one Ni(1) and two equivalent Ni(3) atoms. In the eighth F site, F(8) is bonded in a trigonal planar geometry to two equivalent Na(1) and one Ni(2) atom. is represented by the CIF card [CIF]
data_NaNi4F10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.984
_cell_length_b   8.362
_cell_length_c   6.602
_cell_angle_alpha   90.000
_cell_angle_beta   89.434
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   219.949
_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
  Na  Na0  1  0.500  0.734  0.500  1.0
  Ni  Ni1  1  0.000  0.221  0.000  1.0
  Ni  Ni2  1  0.000  0.058  0.500  1.0
  Ni  Ni3  1  0.500  0.522  0.000  1.0
  Ni  Ni4  1  0.500  0.345  0.500  1.0
  F  F5  1  0.000  0.304  0.500  1.0
  F  F6  1  0.487  0.513  0.299  1.0
  F  F7  1  0.013  0.065  0.210  1.0
  F  F8  1  0.500  0.105  0.500  1.0
  F  F9  1  0.500  0.269  0.000  1.0
  F  F10  1  0.500  0.740  0.000  1.0
  F  F11  1  0.987  0.065  0.790  1.0
  F  F12  1  0.513  0.513  0.701  1.0
  F  F13  1  0.000  0.462  0.000  1.0
  F  F14  1  0.000  0.834  0.500  1.0
[/CIF]
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The structure described by NaNi4F10 crystallizes in the monoclinic P2 space group. Na(1) is bonded to two equivalent F(2) and two equivalent F(8) atoms to form distorted NaF4 tetrahedra that share corners with two equivalent Ni(2)F6 octahedra, corners with two equivalent Ni(3)F6 octahedra, corners with two equivalent Na(1)F4 tetrahedra, and  an edgeedge with one Ni(4)F5 square pyramid. The corner-sharing octahedral tilt angles range from 57-67°. There are four inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to one F(7), two equivalent F(3), and two equivalent F(5) atoms to form distorted NiF5 square pyramids that share corners with two equivalent Ni(2)F6 octahedra, corners with two equivalent Ni(1)F5 square pyramids, and edges with two equivalent Ni(3)F6 octahedra. The corner-sharing octahedral tilt angles are 42°. In the second Ni site, Ni(2) is bonded to one F(1), one F(8), two equivalent F(3), and two equivalent F(4) atoms to form NiF6 octahedra that share corners with two equivalent Ni(2)F6 octahedra, corners with two equivalent Ni(1)F5 square pyramids, corners with two equivalent Na(1)F4 tetrahedra, and edges with two equivalent Ni(4)F5 square pyramids. The corner-sharing octahedral tilt angles are 22°. In the third Ni site, Ni(3) is bonded to one F(5), one F(6), two equivalent F(2), and two equivalent F(7) atoms to form NiF6 octahedra that share corners with two equivalent Ni(3)F6 octahedra, corners with two equivalent Ni(4)F5 square pyramids, corners with two equivalent Na(1)F4 tetrahedra, and edges with two equivalent Ni(1)F5 square pyramids. The corner-sharing octahedral tilt angles are 28°. In the fourth Ni site, Ni(4) is bonded to one F(4), two equivalent F(1), and two equivalent F(2) atoms to form NiF5 square pyramids that share corners with two equivalent Ni(3)F6 octahedra, corners with two equivalent Ni(4)F5 square pyramids, edges with two equivalent Ni(2)F6 octahedra, and  an edgeedge with one Na(1)F4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. There are eight inequivalent F sites. In the first F site, F(1) is bonded in a T-shaped geometry to one Ni(2) and two equivalent Ni(4) atoms. In the second F site, F(2) is bonded in a distorted trigonal planar geometry to one Na(1), one Ni(3), and one Ni(4) atom. In the third F site, F(3) is bonded in a bent 150 degrees geometry to one Ni(1) and one Ni(2) atom. In the fourth F site, F(4) is bonded in a distorted T-shaped geometry to one Ni(4) and two equivalent Ni(2) atoms. In the fifth F site, F(5) is bonded in a distorted T-shaped geometry to one Ni(3) and two equivalent Ni(1) atoms. In the sixth F site, F(6) is bonded in a single-bond geometry to one Ni(3) atom. In the seventh F site, F(7) is bonded in a distorted T-shaped geometry to one Ni(1) and two equivalent Ni(3) atoms. In the eighth F site, F(8) is bonded in a trigonal planar geometry to two equivalent Na(1) and one Ni(2) atom. is represented by the CIF card [CIF]
data_NaNi4F10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.984
_cell_length_b   8.362
_cell_length_c   6.602
_cell_angle_alpha   90.000
_cell_angle_beta   89.434
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   219.949
_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
  Na  Na0  1  0.500  0.734  0.500  1.0
  Ni  Ni1  1  0.000  0.221  0.000  1.0
  Ni  Ni2  1  0.000  0.058  0.500  1.0
  Ni  Ni3  1  0.500  0.522  0.000  1.0
  Ni  Ni4  1  0.500  0.345  0.500  1.0
  F  F5  1  0.000  0.304  0.500  1.0
  F  F6  1  0.487  0.513  0.299  1.0
  F  F7  1  0.013  0.065  0.210  1.0
  F  F8  1  0.500  0.105  0.500  1.0
  F  F9  1  0.500  0.269  0.000  1.0
  F  F10  1  0.500  0.740  0.000  1.0
  F  F11  1  0.987  0.065  0.790  1.0
  F  F12  1  0.513  0.513  0.701  1.0
  F  F13  1  0.000  0.462  0.000  1.0
  F  F14  1  0.000  0.834  0.500  1.0
[/CIF]
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