The structure described by MgHo2(BiO3)4 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(6), one O(8), and one O(9) atom. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a 6-coordinate geometry to one O(12), one O(2), one O(3), one O(4), one O(5), and one O(7) atom. In the second Ho site, Ho(2) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(11), one O(6), one O(8), and one O(9) atom. There are four inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one O(1), one O(10), one O(12), one O(2), one O(4), and one O(9) atom to form distorted corner-sharing BiO6 octahedra. The corner-sharing octahedral tilt angles range from 30-64°. In the second Bi site, Bi(2) is bonded to one O(1), one O(11), one O(12), one O(3), one O(5), and one O(8) atom to form corner-sharing BiO6 octahedra. The corner-sharing octahedral tilt angles range from 29-65°. In the third Bi site, Bi(3) is bonded to one O(11), one O(3), one O(5), one O(6), one O(7), and one O(8) atom to form distorted corner-sharing BiO6 octahedra. The corner-sharing octahedral tilt angles range from 29-65°. In the fourth Bi site, Bi(4) is bonded to one O(10), one O(2), one O(4), one O(6), one O(7), and one O(9) atom to form distorted corner-sharing BiO6 octahedra. The corner-sharing octahedral tilt angles range from 30-64°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal pyramidal geometry to one Mg(1), one Ho(2), one Bi(1), and one Bi(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Ho(1), one Bi(1), and one Bi(4) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Ho(1), one Bi(2), and one Bi(3) atom. In the fourth O site, O(4) is bonded in a T-shaped geometry to one Ho(1), one Bi(1), and one Bi(4) atom. In the fifth O site, O(5) is bonded in a T-shaped geometry to one Ho(1), one Bi(2), and one Bi(3) atom. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Ho(2), one Bi(3), and one Bi(4) atom. In the seventh O site, O(7) is bonded in a trigonal non-coplanar geometry to one Ho(1), one Bi(3), and one Bi(4) atom. In the eighth O site, O(8) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Ho(2), one Bi(2), and one Bi(3) atom. In the ninth O site, O(9) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Ho(2), one Bi(1), and one Bi(4) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Ho(2), one Bi(1), and one Bi(4) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Ho(2), one Bi(2), and one Bi(3) atom. In the twelfth O site, O(12) is bonded in a distorted T-shaped geometry to one Ho(1), one Bi(1), and one Bi(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ho2Mg(BiO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.661
_cell_length_b   6.279
_cell_length_c   8.637
_cell_angle_alpha   89.848
_cell_angle_beta   89.729
_cell_angle_gamma   92.784
_symmetry_Int_Tables_number   1
_cell_volume   306.647
_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  0.037  0.911  0.750  1.0
  Ho  Ho1  1  0.579  0.636  0.250  1.0
  Mg  Mg2  1  0.353  0.227  0.252  1.0
  Bi  Bi3  1  0.018  0.479  0.987  1.0
  Bi  Bi4  1  0.019  0.481  0.512  1.0
  Bi  Bi5  1  0.515  0.005  0.521  1.0
  Bi  Bi6  1  0.511  0.004  0.982  1.0
  O  O7  1  0.205  0.493  0.252  1.0
  O  O8  1  0.183  0.157  0.930  1.0
  O  O9  1  0.183  0.158  0.565  1.0
  O  O10  1  0.283  0.741  0.919  1.0
  O  O11  1  0.282  0.742  0.580  1.0
  O  O12  1  0.401  0.931  0.248  1.0
  O  O13  1  0.674  0.044  0.750  1.0
  O  O14  1  0.619  0.305  0.415  1.0
  O  O15  1  0.615  0.305  0.084  1.0
  O  O16  1  0.774  0.788  0.047  1.0
  O  O17  1  0.774  0.788  0.453  1.0
  O  O18  1  0.917  0.565  0.751  1.0
[/CIF]
.
The structure described by MgHo2(BiO3)4 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(6), one O(8), and one O(9) atom. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a 6-coordinate geometry to one O(12), one O(2), one O(3), one O(4), one O(5), and one O(7) atom. In the second Ho site, Ho(2) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(11), one O(6), one O(8), and one O(9) atom. There are four inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one O(1), one O(10), one O(12), one O(2), one O(4), and one O(9) atom to form distorted corner-sharing BiO6 octahedra. The corner-sharing octahedral tilt angles range from 30-64°. In the second Bi site, Bi(2) is bonded to one O(1), one O(11), one O(12), one O(3), one O(5), and one O(8) atom to form corner-sharing BiO6 octahedra. The corner-sharing octahedral tilt angles range from 29-65°. In the third Bi site, Bi(3) is bonded to one O(11), one O(3), one O(5), one O(6), one O(7), and one O(8) atom to form distorted corner-sharing BiO6 octahedra. The corner-sharing octahedral tilt angles range from 29-65°. In the fourth Bi site, Bi(4) is bonded to one O(10), one O(2), one O(4), one O(6), one O(7), and one O(9) atom to form distorted corner-sharing BiO6 octahedra. The corner-sharing octahedral tilt angles range from 30-64°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal pyramidal geometry to one Mg(1), one Ho(2), one Bi(1), and one Bi(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Ho(1), one Bi(1), and one Bi(4) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Ho(1), one Bi(2), and one Bi(3) atom. In the fourth O site, O(4) is bonded in a T-shaped geometry to one Ho(1), one Bi(1), and one Bi(4) atom. In the fifth O site, O(5) is bonded in a T-shaped geometry to one Ho(1), one Bi(2), and one Bi(3) atom. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Ho(2), one Bi(3), and one Bi(4) atom. In the seventh O site, O(7) is bonded in a trigonal non-coplanar geometry to one Ho(1), one Bi(3), and one Bi(4) atom. In the eighth O site, O(8) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Ho(2), one Bi(2), and one Bi(3) atom. In the ninth O site, O(9) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Ho(2), one Bi(1), and one Bi(4) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Ho(2), one Bi(1), and one Bi(4) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Ho(2), one Bi(2), and one Bi(3) atom. In the twelfth O site, O(12) is bonded in a distorted T-shaped geometry to one Ho(1), one Bi(1), and one Bi(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ho2Mg(BiO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.661
_cell_length_b   6.279
_cell_length_c   8.637
_cell_angle_alpha   89.848
_cell_angle_beta   89.729
_cell_angle_gamma   92.784
_symmetry_Int_Tables_number   1
_cell_volume   306.647
_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  0.037  0.911  0.750  1.0
  Ho  Ho1  1  0.579  0.636  0.250  1.0
  Mg  Mg2  1  0.353  0.227  0.252  1.0
  Bi  Bi3  1  0.018  0.479  0.987  1.0
  Bi  Bi4  1  0.019  0.481  0.512  1.0
  Bi  Bi5  1  0.515  0.005  0.521  1.0
  Bi  Bi6  1  0.511  0.004  0.982  1.0
  O  O7  1  0.205  0.493  0.252  1.0
  O  O8  1  0.183  0.157  0.930  1.0
  O  O9  1  0.183  0.158  0.565  1.0
  O  O10  1  0.283  0.741  0.919  1.0
  O  O11  1  0.282  0.742  0.580  1.0
  O  O12  1  0.401  0.931  0.248  1.0
  O  O13  1  0.674  0.044  0.750  1.0
  O  O14  1  0.619  0.305  0.415  1.0
  O  O15  1  0.615  0.305  0.084  1.0
  O  O16  1  0.774  0.788  0.047  1.0
  O  O17  1  0.774  0.788  0.453  1.0
  O  O18  1  0.917  0.565  0.751  1.0
[/CIF]
.