The crystal structure described by Er9Ho3(MnBi2)2 crystallizes in the monoclinic Pm space group. There are nine inequivalent Er sites. In the first Er site, Er(1) is bonded in a 4-coordinate geometry to two equivalent Mn(1), one Bi(2), and one Bi(4) atom. In the second Er site, Er(2) is bonded to two equivalent Mn(1), one Bi(1), and one Bi(3) atom to form distorted corner-sharing ErMn2Bi2 tetrahedra. In the third Er site, Er(3) is bonded in a 4-coordinate geometry to two equivalent Mn(2), one Bi(2), and one Bi(4) atom. In the fourth Er site, Er(4) is bonded in a 5-coordinate geometry to one Mn(2), two equivalent Bi(1), and two equivalent Bi(4) atoms. In the fifth Er site, Er(5) is bonded in a 5-coordinate geometry to one Mn(1), two equivalent Bi(2), and two equivalent Bi(3) atoms. In the sixth Er site, Er(6) is bonded in a 5-coordinate geometry to one Mn(1), two equivalent Bi(1), and two equivalent Bi(3) atoms. In the seventh Er site, Er(7) is bonded in a 5-coordinate geometry to one Mn(2), two equivalent Bi(2), and two equivalent Bi(4) atoms. In the eighth Er site, Er(8) is bonded in a 5-coordinate geometry to one Mn(2), two equivalent Bi(1), and two equivalent Bi(3) atoms. In the ninth Er site, Er(9) is bonded in a 5-coordinate geometry to one Mn(1), two equivalent Bi(2), and two equivalent Bi(4) atoms. There are three inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a 4-coordinate geometry to two equivalent Mn(2), one Bi(1), and one Bi(4) atom. In the second Ho site, Ho(2) is bonded in a 4-coordinate geometry to two equivalent Mn(1), one Bi(2), and one Bi(3) atom. In the third Ho site, Ho(3) is bonded in a 4-coordinate geometry to two equivalent Mn(2), one Bi(1), and one Bi(3) atom. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 9-coordinate geometry to one Er(5), one Er(6), one Er(9), two equivalent Er(1), two equivalent Er(2), and two equivalent Ho(2) atoms. In the second Mn site, Mn(2) is bonded in a 9-coordinate geometry to one Er(4), one Er(7), one Er(8), two equivalent Er(3), two equivalent Ho(1), and two equivalent Ho(3) atoms. There are four inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 9-coordinate geometry to one Er(2), two equivalent Er(4), two equivalent Er(6), two equivalent Er(8), one Ho(1), and one Ho(3) atom. In the second Bi site, Bi(2) is bonded in a 9-coordinate geometry to one Er(1), one Er(3), two equivalent Er(5), two equivalent Er(7), two equivalent Er(9), and one Ho(2) atom. In the third Bi site, Bi(3) is bonded in a 9-coordinate geometry to one Er(2), two equivalent Er(5), two equivalent Er(6), two equivalent Er(8), one Ho(2), and one Ho(3) atom. In the fourth Bi site, Bi(4) is bonded in a 9-coordinate geometry to one Er(1), one Er(3), two equivalent Er(4), two equivalent Er(7), two equivalent Er(9), and one Ho(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ho3Er9(MnBi2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.274
_cell_length_b   8.229
_cell_length_c   14.241
_cell_angle_alpha   90.006
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   500.841
_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
  Ho  Ho0  1  0.000  0.733  0.500  1.0
  Ho  Ho1  1  0.000  0.233  1.000  1.0
  Ho  Ho2  1  0.000  0.383  0.384  1.0
  Er  Er3  1  0.000  0.883  0.884  1.0
  Er  Er4  1  0.000  0.883  0.116  1.0
  Er  Er5  1  0.000  0.383  0.616  1.0
  Er  Er6  1  0.500  0.108  0.500  1.0
  Er  Er7  1  0.500  0.608  1.000  1.0
  Er  Er8  1  0.500  0.196  0.196  1.0
  Er  Er9  1  0.500  0.696  0.696  1.0
  Er  Er10  1  0.500  0.696  0.304  1.0
  Er  Er11  1  0.500  0.196  0.804  1.0
  Mn  Mn12  1  0.500  1.000  0.000  1.0
  Mn  Mn13  1  0.500  0.500  0.500  1.0
  Bi  Bi14  1  0.000  1.000  0.333  1.0
  Bi  Bi15  1  0.000  0.500  0.833  1.0
  Bi  Bi16  1  0.000  0.500  0.167  1.0
  Bi  Bi17  1  0.000  0.000  0.667  1.0
[/CIF]
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The crystal structure described by Er9Ho3(MnBi2)2 crystallizes in the monoclinic Pm space group. There are nine inequivalent Er sites. In the first Er site, Er(1) is bonded in a 4-coordinate geometry to two equivalent Mn(1), one Bi(2), and one Bi(4) atom. In the second Er site, Er(2) is bonded to two equivalent Mn(1), one Bi(1), and one Bi(3) atom to form distorted corner-sharing ErMn2Bi2 tetrahedra. In the third Er site, Er(3) is bonded in a 4-coordinate geometry to two equivalent Mn(2), one Bi(2), and one Bi(4) atom. In the fourth Er site, Er(4) is bonded in a 5-coordinate geometry to one Mn(2), two equivalent Bi(1), and two equivalent Bi(4) atoms. In the fifth Er site, Er(5) is bonded in a 5-coordinate geometry to one Mn(1), two equivalent Bi(2), and two equivalent Bi(3) atoms. In the sixth Er site, Er(6) is bonded in a 5-coordinate geometry to one Mn(1), two equivalent Bi(1), and two equivalent Bi(3) atoms. In the seventh Er site, Er(7) is bonded in a 5-coordinate geometry to one Mn(2), two equivalent Bi(2), and two equivalent Bi(4) atoms. In the eighth Er site, Er(8) is bonded in a 5-coordinate geometry to one Mn(2), two equivalent Bi(1), and two equivalent Bi(3) atoms. In the ninth Er site, Er(9) is bonded in a 5-coordinate geometry to one Mn(1), two equivalent Bi(2), and two equivalent Bi(4) atoms. There are three inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a 4-coordinate geometry to two equivalent Mn(2), one Bi(1), and one Bi(4) atom. In the second Ho site, Ho(2) is bonded in a 4-coordinate geometry to two equivalent Mn(1), one Bi(2), and one Bi(3) atom. In the third Ho site, Ho(3) is bonded in a 4-coordinate geometry to two equivalent Mn(2), one Bi(1), and one Bi(3) atom. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 9-coordinate geometry to one Er(5), one Er(6), one Er(9), two equivalent Er(1), two equivalent Er(2), and two equivalent Ho(2) atoms. In the second Mn site, Mn(2) is bonded in a 9-coordinate geometry to one Er(4), one Er(7), one Er(8), two equivalent Er(3), two equivalent Ho(1), and two equivalent Ho(3) atoms. There are four inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 9-coordinate geometry to one Er(2), two equivalent Er(4), two equivalent Er(6), two equivalent Er(8), one Ho(1), and one Ho(3) atom. In the second Bi site, Bi(2) is bonded in a 9-coordinate geometry to one Er(1), one Er(3), two equivalent Er(5), two equivalent Er(7), two equivalent Er(9), and one Ho(2) atom. In the third Bi site, Bi(3) is bonded in a 9-coordinate geometry to one Er(2), two equivalent Er(5), two equivalent Er(6), two equivalent Er(8), one Ho(2), and one Ho(3) atom. In the fourth Bi site, Bi(4) is bonded in a 9-coordinate geometry to one Er(1), one Er(3), two equivalent Er(4), two equivalent Er(7), two equivalent Er(9), and one Ho(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ho3Er9(MnBi2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.274
_cell_length_b   8.229
_cell_length_c   14.241
_cell_angle_alpha   90.006
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   500.841
_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
  Ho  Ho0  1  0.000  0.733  0.500  1.0
  Ho  Ho1  1  0.000  0.233  1.000  1.0
  Ho  Ho2  1  0.000  0.383  0.384  1.0
  Er  Er3  1  0.000  0.883  0.884  1.0
  Er  Er4  1  0.000  0.883  0.116  1.0
  Er  Er5  1  0.000  0.383  0.616  1.0
  Er  Er6  1  0.500  0.108  0.500  1.0
  Er  Er7  1  0.500  0.608  1.000  1.0
  Er  Er8  1  0.500  0.196  0.196  1.0
  Er  Er9  1  0.500  0.696  0.696  1.0
  Er  Er10  1  0.500  0.696  0.304  1.0
  Er  Er11  1  0.500  0.196  0.804  1.0
  Mn  Mn12  1  0.500  1.000  0.000  1.0
  Mn  Mn13  1  0.500  0.500  0.500  1.0
  Bi  Bi14  1  0.000  1.000  0.333  1.0
  Bi  Bi15  1  0.000  0.500  0.833  1.0
  Bi  Bi16  1  0.000  0.500  0.167  1.0
  Bi  Bi17  1  0.000  0.000  0.667  1.0
[/CIF]
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