The compound described by MgCo2(GeO3)4 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(10), one O(3), one O(4), one O(5), one O(6), and one O(9) atom to form distorted MgO6 pentagonal pyramids that share corners with two equivalent Ge(1)O4 tetrahedra, corners with two equivalent Ge(2)O4 tetrahedra,  an edgeedge with one Co(1)O6 octahedra, edges with two equivalent Co(2)O6 octahedra,  an edgeedge with one Ge(3)O4 tetrahedra, and  an edgeedge with one Ge(4)O4 tetrahedra. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(10), one O(11), one O(12), one O(7), one O(8), and one O(9) atom to form distorted CoO6 octahedra that share  a cornercorner with one Ge(3)O4 tetrahedra,  a cornercorner with one Ge(4)O4 tetrahedra, corners with two equivalent Ge(1)O4 tetrahedra, corners with two equivalent Ge(2)O4 tetrahedra, edges with two equivalent Co(2)O6 octahedra, and  an edgeedge with one Mg(1)O6 pentagonal pyramid. In the second Co site, Co(2) is bonded to one O(10), one O(11), one O(12), one O(5), one O(6), and one O(9) atom to form CoO6 octahedra that share  a cornercorner with one Ge(1)O4 tetrahedra,  a cornercorner with one Ge(2)O4 tetrahedra, corners with two equivalent Ge(3)O4 tetrahedra, corners with two equivalent Ge(4)O4 tetrahedra, edges with two equivalent Co(1)O6 octahedra, and edges with two equivalent Mg(1)O6 pentagonal pyramids. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(1), one O(4), one O(8), and one O(9) atom to form GeO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra, corners with two equivalent Co(1)O6 octahedra, corners with two equivalent Mg(1)O6 pentagonal pyramids, and corners with two equivalent Ge(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 35-64°. In the second Ge site, Ge(2) is bonded to one O(10), one O(2), one O(3), and one O(7) atom to form GeO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra, corners with two equivalent Co(1)O6 octahedra, corners with two equivalent Mg(1)O6 pentagonal pyramids, and corners with two equivalent Ge(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 39-63°. In the third Ge site, Ge(3) is bonded to one O(11), one O(2), one O(3), and one O(6) atom to form GeO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra, corners with two equivalent Ge(2)O4 tetrahedra, and  an edgeedge with one Mg(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 31-69°. In the fourth Ge site, Ge(4) is bonded to one O(1), one O(12), one O(4), and one O(5) atom to form distorted GeO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra, corners with two equivalent Ge(1)O4 tetrahedra, and  an edgeedge with one Mg(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 35-65°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Ge(1) and one Ge(4) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Ge(2) and one Ge(3) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Mg(1), one Ge(2), and one Ge(3) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Mg(1), one Ge(1), and one Ge(4) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Co(2), and one Ge(4) atom. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Mg(1), one Co(2), and one Ge(3) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Co(1) and one Ge(2) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one Co(1) and one Ge(1) atom. In the ninth O site, O(9) is bonded to one Mg(1), one Co(1), one Co(2), and one Ge(1) atom to form a mixture of distorted corner and edge-sharing OMgCo2Ge tetrahedra. In the tenth O site, O(10) is bonded to one Mg(1), one Co(1), one Co(2), and one Ge(2) atom to form a mixture of distorted corner and edge-sharing OMgCo2Ge tetrahedra. In the eleventh O site, O(11) is bonded in a trigonal non-coplanar geometry to one Co(1), one Co(2), and one Ge(3) atom. In the twelfth O site, O(12) is bonded in a trigonal non-coplanar geometry to one Co(1), one Co(2), and one Ge(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgCo2(GeO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.511
_cell_length_b   6.727
_cell_length_c   6.891
_cell_angle_alpha   80.149
_cell_angle_beta   73.140
_cell_angle_gamma   73.501
_symmetry_Int_Tables_number   1
_cell_volume   233.357
_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
  Mg  Mg0  1  0.754  0.270  0.728  1.0
  Co  Co1  1  0.738  0.894  0.102  1.0
  Co  Co2  1  0.250  0.086  0.911  1.0
  Ge  Ge3  1  0.738  0.377  0.202  1.0
  Ge  Ge4  1  0.766  0.805  0.611  1.0
  Ge  Ge5  1  0.250  0.621  0.808  1.0
  Ge  Ge6  1  0.258  0.182  0.385  1.0
  O  O7  1  0.408  0.394  0.326  1.0
  O  O8  1  0.094  0.677  0.607  1.0
  O  O9  1  0.600  0.599  0.688  1.0
  O  O10  1  0.910  0.311  0.395  1.0
  O  O11  1  0.157  0.118  0.648  1.0
  O  O12  1  0.327  0.352  0.883  1.0
  O  O13  1  0.711  0.941  0.383  1.0
  O  O14  1  0.780  0.620  0.072  1.0
  O  O15  1  0.846  0.198  0.013  1.0
  O  O16  1  0.648  0.985  0.801  1.0
  O  O17  1  0.153  0.818  0.976  1.0
  O  O18  1  0.361  0.023  0.181  1.0
[/CIF]
.
The compound described by MgCo2(GeO3)4 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(10), one O(3), one O(4), one O(5), one O(6), and one O(9) atom to form distorted MgO6 pentagonal pyramids that share corners with two equivalent Ge(1)O4 tetrahedra, corners with two equivalent Ge(2)O4 tetrahedra,  an edgeedge with one Co(1)O6 octahedra, edges with two equivalent Co(2)O6 octahedra,  an edgeedge with one Ge(3)O4 tetrahedra, and  an edgeedge with one Ge(4)O4 tetrahedra. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(10), one O(11), one O(12), one O(7), one O(8), and one O(9) atom to form distorted CoO6 octahedra that share  a cornercorner with one Ge(3)O4 tetrahedra,  a cornercorner with one Ge(4)O4 tetrahedra, corners with two equivalent Ge(1)O4 tetrahedra, corners with two equivalent Ge(2)O4 tetrahedra, edges with two equivalent Co(2)O6 octahedra, and  an edgeedge with one Mg(1)O6 pentagonal pyramid. In the second Co site, Co(2) is bonded to one O(10), one O(11), one O(12), one O(5), one O(6), and one O(9) atom to form CoO6 octahedra that share  a cornercorner with one Ge(1)O4 tetrahedra,  a cornercorner with one Ge(2)O4 tetrahedra, corners with two equivalent Ge(3)O4 tetrahedra, corners with two equivalent Ge(4)O4 tetrahedra, edges with two equivalent Co(1)O6 octahedra, and edges with two equivalent Mg(1)O6 pentagonal pyramids. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(1), one O(4), one O(8), and one O(9) atom to form GeO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra, corners with two equivalent Co(1)O6 octahedra, corners with two equivalent Mg(1)O6 pentagonal pyramids, and corners with two equivalent Ge(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 35-64°. In the second Ge site, Ge(2) is bonded to one O(10), one O(2), one O(3), and one O(7) atom to form GeO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra, corners with two equivalent Co(1)O6 octahedra, corners with two equivalent Mg(1)O6 pentagonal pyramids, and corners with two equivalent Ge(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 39-63°. In the third Ge site, Ge(3) is bonded to one O(11), one O(2), one O(3), and one O(6) atom to form GeO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra, corners with two equivalent Ge(2)O4 tetrahedra, and  an edgeedge with one Mg(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 31-69°. In the fourth Ge site, Ge(4) is bonded to one O(1), one O(12), one O(4), and one O(5) atom to form distorted GeO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra, corners with two equivalent Ge(1)O4 tetrahedra, and  an edgeedge with one Mg(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 35-65°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Ge(1) and one Ge(4) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Ge(2) and one Ge(3) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Mg(1), one Ge(2), and one Ge(3) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Mg(1), one Ge(1), and one Ge(4) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Co(2), and one Ge(4) atom. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Mg(1), one Co(2), and one Ge(3) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Co(1) and one Ge(2) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one Co(1) and one Ge(1) atom. In the ninth O site, O(9) is bonded to one Mg(1), one Co(1), one Co(2), and one Ge(1) atom to form a mixture of distorted corner and edge-sharing OMgCo2Ge tetrahedra. In the tenth O site, O(10) is bonded to one Mg(1), one Co(1), one Co(2), and one Ge(2) atom to form a mixture of distorted corner and edge-sharing OMgCo2Ge tetrahedra. In the eleventh O site, O(11) is bonded in a trigonal non-coplanar geometry to one Co(1), one Co(2), and one Ge(3) atom. In the twelfth O site, O(12) is bonded in a trigonal non-coplanar geometry to one Co(1), one Co(2), and one Ge(4) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgCo2(GeO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.511
_cell_length_b   6.727
_cell_length_c   6.891
_cell_angle_alpha   80.149
_cell_angle_beta   73.140
_cell_angle_gamma   73.501
_symmetry_Int_Tables_number   1
_cell_volume   233.357
_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
  Mg  Mg0  1  0.754  0.270  0.728  1.0
  Co  Co1  1  0.738  0.894  0.102  1.0
  Co  Co2  1  0.250  0.086  0.911  1.0
  Ge  Ge3  1  0.738  0.377  0.202  1.0
  Ge  Ge4  1  0.766  0.805  0.611  1.0
  Ge  Ge5  1  0.250  0.621  0.808  1.0
  Ge  Ge6  1  0.258  0.182  0.385  1.0
  O  O7  1  0.408  0.394  0.326  1.0
  O  O8  1  0.094  0.677  0.607  1.0
  O  O9  1  0.600  0.599  0.688  1.0
  O  O10  1  0.910  0.311  0.395  1.0
  O  O11  1  0.157  0.118  0.648  1.0
  O  O12  1  0.327  0.352  0.883  1.0
  O  O13  1  0.711  0.941  0.383  1.0
  O  O14  1  0.780  0.620  0.072  1.0
  O  O15  1  0.846  0.198  0.013  1.0
  O  O16  1  0.648  0.985  0.801  1.0
  O  O17  1  0.153  0.818  0.976  1.0
  O  O18  1  0.361  0.023  0.181  1.0
[/CIF]
.