The material structure described by Ca2GeN2 crystallizes in the tetragonal P4_2/mbc space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 5-coordinate geometry to one N(2) and four equivalent N(1) atoms. In the second Ca site, Ca(2) is bonded to one N(1) and four equivalent N(2) atoms to form a mixture of distorted corner and edge-sharing CaN5 square pyramids. Ge(1) is bonded in a bent 120 degrees geometry to one N(1) and one N(2) atom. There are two inequivalent N sites. In the first N site, N(1) is bonded to one Ca(2), four equivalent Ca(1), and one Ge(1) atom to form a mixture of distorted corner and edge-sharing NCa5Ge octahedra. The corner-sharing octahedral tilt angles range from 7-60°. In the second N site, N(2) is bonded to one Ca(1), four equivalent Ca(2), and one Ge(1) atom to form a mixture of corner and edge-sharing NCa5Ge octahedra. The corner-sharing octahedral tilt angles range from 7-60°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ca2GeN2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.180
_cell_length_b   11.180
_cell_length_c   5.030
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   628.620
_cell_formula_units_Z   8
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  0.521  0.850  0.500  1.0
  Ca  Ca1  1  0.850  0.479  0.000  1.0
  Ca  Ca2  1  0.150  0.521  0.000  1.0
  Ca  Ca3  1  0.650  0.979  0.000  1.0
  Ca  Ca4  1  0.425  0.367  0.000  1.0
  Ca  Ca5  1  0.021  0.650  0.500  1.0
  Ca  Ca6  1  0.350  0.021  0.000  1.0
  Ca  Ca7  1  0.133  0.075  0.500  1.0
  Ca  Ca8  1  0.867  0.925  0.500  1.0
  Ca  Ca9  1  0.925  0.133  0.000  1.0
  Ca  Ca10  1  0.075  0.867  0.000  1.0
  Ca  Ca11  1  0.575  0.633  0.000  1.0
  Ca  Ca12  1  0.633  0.425  0.500  1.0
  Ca  Ca13  1  0.367  0.575  0.500  1.0
  Ca  Ca14  1  0.479  0.150  0.500  1.0
  Ca  Ca15  1  0.979  0.350  0.500  1.0
  Ge  Ge16  1  0.245  0.344  0.500  1.0
  Ge  Ge17  1  0.755  0.656  0.500  1.0
  Ge  Ge18  1  0.656  0.245  0.000  1.0
  Ge  Ge19  1  0.844  0.745  0.000  1.0
  Ge  Ge20  1  0.745  0.156  0.500  1.0
  Ge  Ge21  1  0.255  0.844  0.500  1.0
  Ge  Ge22  1  0.156  0.255  0.000  1.0
  Ge  Ge23  1  0.344  0.755  0.000  1.0
  N  N24  1  0.164  0.491  0.500  1.0
  N  N25  1  0.636  0.410  0.000  1.0
  N  N26  1  0.364  0.590  0.000  1.0
  N  N27  1  0.864  0.910  0.000  1.0
  N  N28  1  0.910  0.136  0.500  1.0
  N  N29  1  0.090  0.864  0.500  1.0
  N  N30  1  0.136  0.090  0.000  1.0
  N  N31  1  0.009  0.336  0.000  1.0
  N  N32  1  0.336  0.991  0.500  1.0
  N  N33  1  0.664  0.009  0.500  1.0
  N  N34  1  0.410  0.364  0.500  1.0
  N  N35  1  0.991  0.664  0.000  1.0
  N  N36  1  0.491  0.836  0.000  1.0
  N  N37  1  0.509  0.164  0.000  1.0
  N  N38  1  0.836  0.509  0.500  1.0
  N  N39  1  0.590  0.636  0.500  1.0
[/CIF]
.
The material structure described by Ca2GeN2 crystallizes in the tetragonal P4_2/mbc space group. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 5-coordinate geometry to one N(2) and four equivalent N(1) atoms. In the second Ca site, Ca(2) is bonded to one N(1) and four equivalent N(2) atoms to form a mixture of distorted corner and edge-sharing CaN5 square pyramids. Ge(1) is bonded in a bent 120 degrees geometry to one N(1) and one N(2) atom. There are two inequivalent N sites. In the first N site, N(1) is bonded to one Ca(2), four equivalent Ca(1), and one Ge(1) atom to form a mixture of distorted corner and edge-sharing NCa5Ge octahedra. The corner-sharing octahedral tilt angles range from 7-60°. In the second N site, N(2) is bonded to one Ca(1), four equivalent Ca(2), and one Ge(1) atom to form a mixture of corner and edge-sharing NCa5Ge octahedra. The corner-sharing octahedral tilt angles range from 7-60°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ca2GeN2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.180
_cell_length_b   11.180
_cell_length_c   5.030
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   628.620
_cell_formula_units_Z   8
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  0.521  0.850  0.500  1.0
  Ca  Ca1  1  0.850  0.479  0.000  1.0
  Ca  Ca2  1  0.150  0.521  0.000  1.0
  Ca  Ca3  1  0.650  0.979  0.000  1.0
  Ca  Ca4  1  0.425  0.367  0.000  1.0
  Ca  Ca5  1  0.021  0.650  0.500  1.0
  Ca  Ca6  1  0.350  0.021  0.000  1.0
  Ca  Ca7  1  0.133  0.075  0.500  1.0
  Ca  Ca8  1  0.867  0.925  0.500  1.0
  Ca  Ca9  1  0.925  0.133  0.000  1.0
  Ca  Ca10  1  0.075  0.867  0.000  1.0
  Ca  Ca11  1  0.575  0.633  0.000  1.0
  Ca  Ca12  1  0.633  0.425  0.500  1.0
  Ca  Ca13  1  0.367  0.575  0.500  1.0
  Ca  Ca14  1  0.479  0.150  0.500  1.0
  Ca  Ca15  1  0.979  0.350  0.500  1.0
  Ge  Ge16  1  0.245  0.344  0.500  1.0
  Ge  Ge17  1  0.755  0.656  0.500  1.0
  Ge  Ge18  1  0.656  0.245  0.000  1.0
  Ge  Ge19  1  0.844  0.745  0.000  1.0
  Ge  Ge20  1  0.745  0.156  0.500  1.0
  Ge  Ge21  1  0.255  0.844  0.500  1.0
  Ge  Ge22  1  0.156  0.255  0.000  1.0
  Ge  Ge23  1  0.344  0.755  0.000  1.0
  N  N24  1  0.164  0.491  0.500  1.0
  N  N25  1  0.636  0.410  0.000  1.0
  N  N26  1  0.364  0.590  0.000  1.0
  N  N27  1  0.864  0.910  0.000  1.0
  N  N28  1  0.910  0.136  0.500  1.0
  N  N29  1  0.090  0.864  0.500  1.0
  N  N30  1  0.136  0.090  0.000  1.0
  N  N31  1  0.009  0.336  0.000  1.0
  N  N32  1  0.336  0.991  0.500  1.0
  N  N33  1  0.664  0.009  0.500  1.0
  N  N34  1  0.410  0.364  0.500  1.0
  N  N35  1  0.991  0.664  0.000  1.0
  N  N36  1  0.491  0.836  0.000  1.0
  N  N37  1  0.509  0.164  0.000  1.0
  N  N38  1  0.836  0.509  0.500  1.0
  N  N39  1  0.590  0.636  0.500  1.0
[/CIF]
.