The material described by Ca2Eu(Ni2Zn3)3 crystallizes in the hexagonal P6/mmm space group. Ca(1) is bonded in a 18-coordinate geometry to six equivalent Ni(1), six equivalent Zn(1), and six equivalent Zn(2) atoms. Eu(1) is bonded in a hexagonal planar geometry to six equivalent Ni(1) atoms. Ni(1) is bonded in a 9-coordinate geometry to two equivalent Ca(1), one Eu(1), two equivalent Zn(2), and four equivalent Zn(1) atoms. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 4-coordinate geometry to two equivalent Ca(1) and four equivalent Ni(1) atoms. In the second Zn site, Zn(2) is bonded to four equivalent Ca(1) and four equivalent Ni(1) atoms to form a mixture of distorted corner, edge, and face-sharing ZnCa4Ni4 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ca2Eu(Zn3Ni2)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.155
_cell_length_b   9.155
_cell_length_c   4.182
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   303.526
_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
  Ca  Ca0  1  0.333  0.667  0.500  1.0
  Ca  Ca1  1  0.667  0.333  0.500  1.0
  Eu  Eu2  1  0.000  0.000  0.000  1.0
  Zn  Zn3  1  0.707  0.000  0.500  1.0
  Zn  Zn4  1  0.000  0.707  0.500  1.0
  Zn  Zn5  1  0.293  0.293  0.500  1.0
  Zn  Zn6  1  0.293  0.000  0.500  1.0
  Zn  Zn7  1  0.000  0.293  0.500  1.0
  Zn  Zn8  1  0.707  0.707  0.500  1.0
  Zn  Zn9  1  0.000  0.500  0.000  1.0
  Zn  Zn10  1  0.500  0.500  0.000  1.0
  Zn  Zn11  1  0.500  0.000  0.000  1.0
  Ni  Ni12  1  0.818  0.182  0.000  1.0
  Ni  Ni13  1  0.818  0.637  0.000  1.0
  Ni  Ni14  1  0.363  0.182  0.000  1.0
  Ni  Ni15  1  0.182  0.818  0.000  1.0
  Ni  Ni16  1  0.637  0.818  0.000  1.0
  Ni  Ni17  1  0.182  0.363  0.000  1.0
[/CIF]
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The material described by Ca2Eu(Ni2Zn3)3 crystallizes in the hexagonal P6/mmm space group. Ca(1) is bonded in a 18-coordinate geometry to six equivalent Ni(1), six equivalent Zn(1), and six equivalent Zn(2) atoms. Eu(1) is bonded in a hexagonal planar geometry to six equivalent Ni(1) atoms. Ni(1) is bonded in a 9-coordinate geometry to two equivalent Ca(1), one Eu(1), two equivalent Zn(2), and four equivalent Zn(1) atoms. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 4-coordinate geometry to two equivalent Ca(1) and four equivalent Ni(1) atoms. In the second Zn site, Zn(2) is bonded to four equivalent Ca(1) and four equivalent Ni(1) atoms to form a mixture of distorted corner, edge, and face-sharing ZnCa4Ni4 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ca2Eu(Zn3Ni2)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.155
_cell_length_b   9.155
_cell_length_c   4.182
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   303.526
_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
  Ca  Ca0  1  0.333  0.667  0.500  1.0
  Ca  Ca1  1  0.667  0.333  0.500  1.0
  Eu  Eu2  1  0.000  0.000  0.000  1.0
  Zn  Zn3  1  0.707  0.000  0.500  1.0
  Zn  Zn4  1  0.000  0.707  0.500  1.0
  Zn  Zn5  1  0.293  0.293  0.500  1.0
  Zn  Zn6  1  0.293  0.000  0.500  1.0
  Zn  Zn7  1  0.000  0.293  0.500  1.0
  Zn  Zn8  1  0.707  0.707  0.500  1.0
  Zn  Zn9  1  0.000  0.500  0.000  1.0
  Zn  Zn10  1  0.500  0.500  0.000  1.0
  Zn  Zn11  1  0.500  0.000  0.000  1.0
  Ni  Ni12  1  0.818  0.182  0.000  1.0
  Ni  Ni13  1  0.818  0.637  0.000  1.0
  Ni  Ni14  1  0.363  0.182  0.000  1.0
  Ni  Ni15  1  0.182  0.818  0.000  1.0
  Ni  Ni16  1  0.637  0.818  0.000  1.0
  Ni  Ni17  1  0.182  0.363  0.000  1.0
[/CIF]
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