The compound described by Co3Al2GeO8 is Spinel-derived structured and crystallizes in the orthorhombic Imm2 space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(3) and two equivalent O(4) atoms to form CoO4 tetrahedra that share corners with six equivalent Co(2)O6 octahedra and corners with six equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-61°. In the second Co site, Co(2) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms to form CoO6 octahedra that share corners with three equivalent Co(1)O4 tetrahedra, corners with three equivalent Ge(1)O4 tetrahedra, edges with two equivalent Co(2)O6 octahedra, and edges with four equivalent Al(1)O6 octahedra. Al(1) is bonded to one O(2), one O(4), two equivalent O(1), and two equivalent O(3) atoms to form AlO6 octahedra that share corners with three equivalent Co(1)O4 tetrahedra, corners with three equivalent Ge(1)O4 tetrahedra, edges with two equivalent Al(1)O6 octahedra, and edges with four equivalent Co(2)O6 octahedra. Ge(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form GeO4 tetrahedra that share corners with six equivalent Co(2)O6 octahedra and corners with six equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-58°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Co(2), two equivalent Al(1), and one Ge(1) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to two equivalent Co(2), one Al(1), and one Ge(1) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Co(1), one Co(2), and two equivalent Al(1) atoms. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Co(1), two equivalent Co(2), and one Al(1) atom. is represented by the CIF file [CIF]
data_Al2Co3GeO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.887
_cell_length_b   5.887
_cell_length_c   5.887
_cell_angle_alpha   120.692
_cell_angle_beta   119.872
_cell_angle_gamma   89.514
_symmetry_Int_Tables_number   1
_cell_volume   143.647
_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
  Al  Al0  1  0.617  0.380  0.236  1.0
  Al  Al1  1  0.144  0.380  0.764  1.0
  Co  Co2  1  0.245  0.745  0.500  1.0
  Co  Co3  1  0.622  0.378  0.756  1.0
  Co  Co4  1  0.622  0.866  0.244  1.0
  Ge  Ge5  1  0.009  0.009  0.000  1.0
  O  O6  1  0.881  0.145  0.264  1.0
  O  O7  1  0.881  0.617  0.736  1.0
  O  O8  1  0.891  0.139  0.751  1.0
  O  O9  1  0.388  0.139  0.249  1.0
  O  O10  1  0.374  0.592  0.218  1.0
  O  O11  1  0.374  0.156  0.782  1.0
  O  O12  1  0.361  0.601  0.760  1.0
  O  O13  1  0.841  0.601  0.240  1.0
[/CIF]
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The compound described by Co3Al2GeO8 is Spinel-derived structured and crystallizes in the orthorhombic Imm2 space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(3) and two equivalent O(4) atoms to form CoO4 tetrahedra that share corners with six equivalent Co(2)O6 octahedra and corners with six equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-61°. In the second Co site, Co(2) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms to form CoO6 octahedra that share corners with three equivalent Co(1)O4 tetrahedra, corners with three equivalent Ge(1)O4 tetrahedra, edges with two equivalent Co(2)O6 octahedra, and edges with four equivalent Al(1)O6 octahedra. Al(1) is bonded to one O(2), one O(4), two equivalent O(1), and two equivalent O(3) atoms to form AlO6 octahedra that share corners with three equivalent Co(1)O4 tetrahedra, corners with three equivalent Ge(1)O4 tetrahedra, edges with two equivalent Al(1)O6 octahedra, and edges with four equivalent Co(2)O6 octahedra. Ge(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form GeO4 tetrahedra that share corners with six equivalent Co(2)O6 octahedra and corners with six equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-58°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Co(2), two equivalent Al(1), and one Ge(1) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to two equivalent Co(2), one Al(1), and one Ge(1) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Co(1), one Co(2), and two equivalent Al(1) atoms. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Co(1), two equivalent Co(2), and one Al(1) atom. is represented by the CIF file [CIF]
data_Al2Co3GeO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.887
_cell_length_b   5.887
_cell_length_c   5.887
_cell_angle_alpha   120.692
_cell_angle_beta   119.872
_cell_angle_gamma   89.514
_symmetry_Int_Tables_number   1
_cell_volume   143.647
_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
  Al  Al0  1  0.617  0.380  0.236  1.0
  Al  Al1  1  0.144  0.380  0.764  1.0
  Co  Co2  1  0.245  0.745  0.500  1.0
  Co  Co3  1  0.622  0.378  0.756  1.0
  Co  Co4  1  0.622  0.866  0.244  1.0
  Ge  Ge5  1  0.009  0.009  0.000  1.0
  O  O6  1  0.881  0.145  0.264  1.0
  O  O7  1  0.881  0.617  0.736  1.0
  O  O8  1  0.891  0.139  0.751  1.0
  O  O9  1  0.388  0.139  0.249  1.0
  O  O10  1  0.374  0.592  0.218  1.0
  O  O11  1  0.374  0.156  0.782  1.0
  O  O12  1  0.361  0.601  0.760  1.0
  O  O13  1  0.841  0.601  0.240  1.0
[/CIF]
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