The material described by Ce2Ni2Mg crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a distorted rectangular see-saw-like geometry to one Ni(1), one Ni(2), and two equivalent Ni(3) atoms. In the second Mg site, Mg(2) is bonded in a distorted rectangular see-saw-like geometry to one Ni(1), one Ni(2), and two equivalent Ni(4) atoms. There are four inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 6-coordinate geometry to one Ni(2), one Ni(4), two equivalent Ni(1), and two equivalent Ni(3) atoms. In the second Ce site, Ce(2) is bonded in a 6-coordinate geometry to one Ni(1), two equivalent Ni(2), and three equivalent Ni(4) atoms. In the third Ce site, Ce(3) is bonded in a 6-coordinate geometry to one Ni(2), two equivalent Ni(1), and three equivalent Ni(3) atoms. In the fourth Ce site, Ce(4) is bonded in a 6-coordinate geometry to one Ni(1), one Ni(3), two equivalent Ni(2), and two equivalent Ni(4) atoms. There are four inequivalent Ni sites. In the first Ni site, Ni(3) is bonded in a 9-coordinate geometry to two equivalent Mg(1), one Ce(4), two equivalent Ce(1), three equivalent Ce(3), and one Ni(1) atom. In the second Ni site, Ni(4) is bonded in a 9-coordinate geometry to two equivalent Mg(2), one Ce(1), two equivalent Ce(4), three equivalent Ce(2), and one Ni(2) atom. In the third Ni site, Ni(1) is bonded in a 9-coordinate geometry to one Mg(1), one Mg(2), one Ce(2), one Ce(4), two equivalent Ce(1), two equivalent Ce(3), and one Ni(3) atom. In the fourth Ni site, Ni(2) is bonded in a 9-coordinate geometry to one Mg(1), one Mg(2), one Ce(1), one Ce(3), two equivalent Ce(2), two equivalent Ce(4), and one Ni(4) atom. is represented by the CIF card [CIF]
data_Ce2MgNi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.595
_cell_length_b   7.545
_cell_length_c   7.569
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.015
_symmetry_Int_Tables_number   1
_cell_volume   205.335
_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
  Ce  Ce0  1  1.000  0.833  0.668  1.0
  Ce  Ce1  1  0.000  0.667  0.168  1.0
  Ce  Ce2  1  0.000  0.167  0.332  1.0
  Ce  Ce3  1  1.000  0.333  0.832  1.0
  Mg  Mg4  1  0.500  0.500  0.500  1.0
  Mg  Mg5  1  0.500  1.000  0.000  1.0
  Ni  Ni6  1  0.499  0.631  0.872  1.0
  Ni  Ni7  1  0.501  0.869  0.372  1.0
  Ni  Ni8  1  0.501  0.369  0.128  1.0
  Ni  Ni9  1  0.499  0.131  0.628  1.0
[/CIF]
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The material described by Ce2Ni2Mg crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a distorted rectangular see-saw-like geometry to one Ni(1), one Ni(2), and two equivalent Ni(3) atoms. In the second Mg site, Mg(2) is bonded in a distorted rectangular see-saw-like geometry to one Ni(1), one Ni(2), and two equivalent Ni(4) atoms. There are four inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 6-coordinate geometry to one Ni(2), one Ni(4), two equivalent Ni(1), and two equivalent Ni(3) atoms. In the second Ce site, Ce(2) is bonded in a 6-coordinate geometry to one Ni(1), two equivalent Ni(2), and three equivalent Ni(4) atoms. In the third Ce site, Ce(3) is bonded in a 6-coordinate geometry to one Ni(2), two equivalent Ni(1), and three equivalent Ni(3) atoms. In the fourth Ce site, Ce(4) is bonded in a 6-coordinate geometry to one Ni(1), one Ni(3), two equivalent Ni(2), and two equivalent Ni(4) atoms. There are four inequivalent Ni sites. In the first Ni site, Ni(3) is bonded in a 9-coordinate geometry to two equivalent Mg(1), one Ce(4), two equivalent Ce(1), three equivalent Ce(3), and one Ni(1) atom. In the second Ni site, Ni(4) is bonded in a 9-coordinate geometry to two equivalent Mg(2), one Ce(1), two equivalent Ce(4), three equivalent Ce(2), and one Ni(2) atom. In the third Ni site, Ni(1) is bonded in a 9-coordinate geometry to one Mg(1), one Mg(2), one Ce(2), one Ce(4), two equivalent Ce(1), two equivalent Ce(3), and one Ni(3) atom. In the fourth Ni site, Ni(2) is bonded in a 9-coordinate geometry to one Mg(1), one Mg(2), one Ce(1), one Ce(3), two equivalent Ce(2), two equivalent Ce(4), and one Ni(4) atom. is represented by the CIF card [CIF]
data_Ce2MgNi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.595
_cell_length_b   7.545
_cell_length_c   7.569
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.015
_symmetry_Int_Tables_number   1
_cell_volume   205.335
_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
  Ce  Ce0  1  1.000  0.833  0.668  1.0
  Ce  Ce1  1  0.000  0.667  0.168  1.0
  Ce  Ce2  1  0.000  0.167  0.332  1.0
  Ce  Ce3  1  1.000  0.333  0.832  1.0
  Mg  Mg4  1  0.500  0.500  0.500  1.0
  Mg  Mg5  1  0.500  1.000  0.000  1.0
  Ni  Ni6  1  0.499  0.631  0.872  1.0
  Ni  Ni7  1  0.501  0.869  0.372  1.0
  Ni  Ni8  1  0.501  0.369  0.128  1.0
  Ni  Ni9  1  0.499  0.131  0.628  1.0
[/CIF]
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