The structure described by CaGe2 crystallizes in the trigonal R-3m space group. Ca(1) is bonded in a 7-coordinate geometry to three equivalent Ge(2) and four equivalent Ge(1) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(2) is bonded to three equivalent Ca(1) and three equivalent Ge(2) atoms to form distorted edge-sharing GeCa3Ge3 octahedra. In the second Ge site, Ge(1) is bonded in a 7-coordinate geometry to four equivalent Ca(1) and three equivalent Ge(1) atoms. is represented by the CIF card [CIF]
data_CaGe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.049
_cell_length_b   4.049
_cell_length_c   10.420
_cell_angle_alpha   78.796
_cell_angle_beta   78.796
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   144.192
_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  0.919  0.919  0.242  1.0
  Ca  Ca1  1  0.081  0.081  0.758  1.0
  Ge  Ge2  1  0.815  0.815  0.556  1.0
  Ge  Ge3  1  0.185  0.185  0.444  1.0
  Ge  Ge4  1  0.650  0.650  0.051  1.0
  Ge  Ge5  1  0.350  0.350  0.949  1.0
[/CIF]
.
The structure described by CaGe2 crystallizes in the trigonal R-3m space group. Ca(1) is bonded in a 7-coordinate geometry to three equivalent Ge(2) and four equivalent Ge(1) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(2) is bonded to three equivalent Ca(1) and three equivalent Ge(2) atoms to form distorted edge-sharing GeCa3Ge3 octahedra. In the second Ge site, Ge(1) is bonded in a 7-coordinate geometry to four equivalent Ca(1) and three equivalent Ge(1) atoms. is represented by the CIF card [CIF]
data_CaGe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.049
_cell_length_b   4.049
_cell_length_c   10.420
_cell_angle_alpha   78.796
_cell_angle_beta   78.796
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   144.192
_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  0.919  0.919  0.242  1.0
  Ca  Ca1  1  0.081  0.081  0.758  1.0
  Ge  Ge2  1  0.815  0.815  0.556  1.0
  Ge  Ge3  1  0.185  0.185  0.444  1.0
  Ge  Ge4  1  0.650  0.650  0.051  1.0
  Ge  Ge5  1  0.350  0.350  0.949  1.0
[/CIF]
.