The material described by CaCoGe2O6 is Esseneite structured and crystallizes in the triclinic P1 space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(11), one O(12), one O(2), one O(7), one O(8), and one O(9) atom. In the second Ca site, Ca(2) is bonded in a 8-coordinate geometry to one O(10), one O(11), one O(12), one O(3), one O(4), one O(5), one O(6), and one O(9) atom. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) 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, and edges with two equivalent Co(2)O6 octahedra. In the second Co site, Co(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form 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, and edges with two equivalent Co(1)O6 octahedra. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(1), one O(12), one O(5), and one O(9) atom to form GeO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra, and corners with two equivalent Ge(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 43-60°. In the second Ge site, Ge(2) is bonded to one O(10), one O(11), one O(2), 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, and corners with two equivalent Ge(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 43-60°. In the third Ge site, Ge(3) is bonded to one O(10), one O(11), 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, and corners with two equivalent Ge(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 43-59°. In the fourth Ge site, Ge(4) is bonded to one O(12), 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, and corners with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 44-59°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded to one Ca(1), one Co(1), one Co(2), and one Ge(1) atom to form a mixture of distorted edge and corner-sharing OCaCo2Ge tetrahedra. In the second O site, O(2) is bonded to one Ca(1), one Co(1), one Co(2), and one Ge(2) atom to form a mixture of distorted edge and corner-sharing OCaCo2Ge tetrahedra. In the third O site, O(3) is bonded to one Ca(2), one Co(1), one Co(2), and one Ge(3) atom to form a mixture of distorted edge and corner-sharing OCaCo2Ge tetrahedra. In the fourth O site, O(4) is bonded to one Ca(2), one Co(1), one Co(2), and one Ge(4) atom to form a mixture of distorted edge and corner-sharing OCaCo2Ge tetrahedra. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Ca(2), one Co(2), and one Ge(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Ca(2), one Co(2), and one Ge(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Ca(1), one Co(1), and one Ge(3) atom. In the eighth O site, O(8) is bonded in a distorted trigonal non-coplanar geometry to one Ca(1), one Co(1), and one Ge(4) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(2), one Ge(1), and one Ge(4) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(2), one Ge(2), and one Ge(3) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(2), one Ge(2), and one Ge(3) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(2), one Ge(1), and one Ge(4) atom. is represented by the CIF card [CIF]
data_CaCo(GeO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.507
_cell_length_b   6.856
_cell_length_c   6.857
_cell_angle_alpha   82.691
_cell_angle_beta   78.609
_cell_angle_gamma   78.545
_symmetry_Int_Tables_number   1
_cell_volume   247.710
_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
  Ca  Ca0  1  0.249  0.303  0.697  1.0
  Ca  Ca1  1  0.750  0.697  0.303  1.0
  Co  Co2  1  0.749  0.090  0.909  1.0
  Co  Co3  1  0.250  0.908  0.092  1.0
  Ge  Ge4  1  0.225  0.815  0.617  1.0
  Ge  Ge5  1  0.275  0.383  0.186  1.0
  Ge  Ge6  1  0.774  0.186  0.383  1.0
  Ge  Ge7  1  0.726  0.617  0.814  1.0
  O  O8  1  0.133  0.984  0.799  1.0
  O  O9  1  0.367  0.201  0.016  1.0
  O  O10  1  0.864  0.016  0.201  1.0
  O  O11  1  0.636  0.799  0.983  1.0
  O  O12  1  0.344  0.898  0.373  1.0
  O  O13  1  0.156  0.627  0.102  1.0
  O  O14  1  0.655  0.102  0.627  1.0
  O  O15  1  0.846  0.374  0.898  1.0
  O  O16  1  0.983  0.671  0.610  1.0
  O  O17  1  0.517  0.389  0.329  1.0
  O  O18  1  0.017  0.329  0.389  1.0
  O  O19  1  0.483  0.611  0.671  1.0
[/CIF]
.
The material described by CaCoGe2O6 is Esseneite structured and crystallizes in the triclinic P1 space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(11), one O(12), one O(2), one O(7), one O(8), and one O(9) atom. In the second Ca site, Ca(2) is bonded in a 8-coordinate geometry to one O(10), one O(11), one O(12), one O(3), one O(4), one O(5), one O(6), and one O(9) atom. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) 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, and edges with two equivalent Co(2)O6 octahedra. In the second Co site, Co(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form 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, and edges with two equivalent Co(1)O6 octahedra. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(1), one O(12), one O(5), and one O(9) atom to form GeO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra, and corners with two equivalent Ge(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 43-60°. In the second Ge site, Ge(2) is bonded to one O(10), one O(11), one O(2), 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, and corners with two equivalent Ge(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 43-60°. In the third Ge site, Ge(3) is bonded to one O(10), one O(11), 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, and corners with two equivalent Ge(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 43-59°. In the fourth Ge site, Ge(4) is bonded to one O(12), 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, and corners with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 44-59°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded to one Ca(1), one Co(1), one Co(2), and one Ge(1) atom to form a mixture of distorted edge and corner-sharing OCaCo2Ge tetrahedra. In the second O site, O(2) is bonded to one Ca(1), one Co(1), one Co(2), and one Ge(2) atom to form a mixture of distorted edge and corner-sharing OCaCo2Ge tetrahedra. In the third O site, O(3) is bonded to one Ca(2), one Co(1), one Co(2), and one Ge(3) atom to form a mixture of distorted edge and corner-sharing OCaCo2Ge tetrahedra. In the fourth O site, O(4) is bonded to one Ca(2), one Co(1), one Co(2), and one Ge(4) atom to form a mixture of distorted edge and corner-sharing OCaCo2Ge tetrahedra. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Ca(2), one Co(2), and one Ge(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Ca(2), one Co(2), and one Ge(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Ca(1), one Co(1), and one Ge(3) atom. In the eighth O site, O(8) is bonded in a distorted trigonal non-coplanar geometry to one Ca(1), one Co(1), and one Ge(4) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(2), one Ge(1), and one Ge(4) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(2), one Ge(2), and one Ge(3) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(2), one Ge(2), and one Ge(3) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Ca(1), one Ca(2), one Ge(1), and one Ge(4) atom. is represented by the CIF card [CIF]
data_CaCo(GeO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.507
_cell_length_b   6.856
_cell_length_c   6.857
_cell_angle_alpha   82.691
_cell_angle_beta   78.609
_cell_angle_gamma   78.545
_symmetry_Int_Tables_number   1
_cell_volume   247.710
_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
  Ca  Ca0  1  0.249  0.303  0.697  1.0
  Ca  Ca1  1  0.750  0.697  0.303  1.0
  Co  Co2  1  0.749  0.090  0.909  1.0
  Co  Co3  1  0.250  0.908  0.092  1.0
  Ge  Ge4  1  0.225  0.815  0.617  1.0
  Ge  Ge5  1  0.275  0.383  0.186  1.0
  Ge  Ge6  1  0.774  0.186  0.383  1.0
  Ge  Ge7  1  0.726  0.617  0.814  1.0
  O  O8  1  0.133  0.984  0.799  1.0
  O  O9  1  0.367  0.201  0.016  1.0
  O  O10  1  0.864  0.016  0.201  1.0
  O  O11  1  0.636  0.799  0.983  1.0
  O  O12  1  0.344  0.898  0.373  1.0
  O  O13  1  0.156  0.627  0.102  1.0
  O  O14  1  0.655  0.102  0.627  1.0
  O  O15  1  0.846  0.374  0.898  1.0
  O  O16  1  0.983  0.671  0.610  1.0
  O  O17  1  0.517  0.389  0.329  1.0
  O  O18  1  0.017  0.329  0.389  1.0
  O  O19  1  0.483  0.611  0.671  1.0
[/CIF]
.