The compound described by Tb4Mg3Co2 crystallizes in the monoclinic P2/m space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 10-coordinate geometry to one Mg(1), four equivalent Tb(1), four equivalent Tb(2), and one Co(1) atom. In the second Mg site, Mg(2) is bonded in a 10-coordinate geometry to four equivalent Tb(1), four equivalent Tb(2), and two equivalent Co(1) atoms. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 4-coordinate geometry to two equivalent Mg(2), four equivalent Mg(1), and four equivalent Co(1) atoms. In the second Tb site, Tb(2) is bonded in a distorted L-shaped geometry to two equivalent Mg(2), four equivalent Mg(1), and two equivalent Co(1) atoms. Co(1) is bonded in a 9-coordinate geometry to one Mg(1), one Mg(2), two equivalent Tb(2), four equivalent Tb(1), and one Co(1) atom. is represented by the CIF file [CIF]
data_Tb4Mg3Co2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.609
_cell_length_b   7.593
_cell_length_c   8.380
_cell_angle_alpha   109.171
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   216.894
_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
  Tb  Tb0  1  0.500  0.394  0.178  1.0
  Tb  Tb1  1  0.500  0.606  0.822  1.0
  Tb  Tb2  1  0.500  0.905  0.276  1.0
  Tb  Tb3  1  0.500  0.095  0.724  1.0
  Mg  Mg4  1  0.000  0.295  0.501  1.0
  Mg  Mg5  1  0.000  0.000  0.000  1.0
  Mg  Mg6  1  0.000  0.705  0.499  1.0
  Co  Co7  1  0.000  0.352  0.898  1.0
  Co  Co8  1  0.000  0.648  0.102  1.0
[/CIF]
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The compound described by Tb4Mg3Co2 crystallizes in the monoclinic P2/m space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 10-coordinate geometry to one Mg(1), four equivalent Tb(1), four equivalent Tb(2), and one Co(1) atom. In the second Mg site, Mg(2) is bonded in a 10-coordinate geometry to four equivalent Tb(1), four equivalent Tb(2), and two equivalent Co(1) atoms. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 4-coordinate geometry to two equivalent Mg(2), four equivalent Mg(1), and four equivalent Co(1) atoms. In the second Tb site, Tb(2) is bonded in a distorted L-shaped geometry to two equivalent Mg(2), four equivalent Mg(1), and two equivalent Co(1) atoms. Co(1) is bonded in a 9-coordinate geometry to one Mg(1), one Mg(2), two equivalent Tb(2), four equivalent Tb(1), and one Co(1) atom. is represented by the CIF file [CIF]
data_Tb4Mg3Co2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.609
_cell_length_b   7.593
_cell_length_c   8.380
_cell_angle_alpha   109.171
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   216.894
_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
  Tb  Tb0  1  0.500  0.394  0.178  1.0
  Tb  Tb1  1  0.500  0.606  0.822  1.0
  Tb  Tb2  1  0.500  0.905  0.276  1.0
  Tb  Tb3  1  0.500  0.095  0.724  1.0
  Mg  Mg4  1  0.000  0.295  0.501  1.0
  Mg  Mg5  1  0.000  0.000  0.000  1.0
  Mg  Mg6  1  0.000  0.705  0.499  1.0
  Co  Co7  1  0.000  0.352  0.898  1.0
  Co  Co8  1  0.000  0.648  0.102  1.0
[/CIF]
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