The structure described by CaGeN2 crystallizes in the tetragonal P4/nmm space group. Ca(1) is bonded to five equivalent N(2) atoms to form a mixture of corner and edge-sharing CaN5 square pyramids. Ge(1) is bonded in a 5-coordinate geometry to one N(2) and four equivalent N(1) atoms. There are two inequivalent N sites. In the first N site, N(1) is bonded to four equivalent Ge(1) atoms to form distorted NGe4 trigonal pyramids that share corners with four equivalent N(2)Ca5Ge octahedra, corners with four equivalent N(1)Ge4 trigonal pyramids, and edges with four equivalent N(1)Ge4 trigonal pyramids. The corner-sharing octahedral tilt angles are 66°. In the second N site, N(2) is bonded to five equivalent Ca(1) and one Ge(1) atom to form NCa5Ge octahedra that share corners with four equivalent N(2)Ca5Ge octahedra, corners with four equivalent N(1)Ge4 trigonal pyramids, and edges with eight equivalent N(2)Ca5Ge octahedra. The corner-sharing octahedral tilt angles are 6°. is represented by the Crystallographic Information File (CIF) [CIF]
data_CaGeN2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.671
_cell_length_b   3.671
_cell_length_c   7.688
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   103.575
_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  0.000  0.500  0.143  1.0
  Ca  Ca1  1  0.500  0.000  0.857  1.0
  Ge  Ge2  1  0.000  0.500  0.604  1.0
  Ge  Ge3  1  0.500  0.000  0.396  1.0
  N  N4  1  0.000  0.000  0.500  1.0
  N  N5  1  0.500  0.500  0.500  1.0
  N  N6  1  0.000  0.500  0.840  1.0
  N  N7  1  0.500  0.000  0.160  1.0
[/CIF]
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The structure described by CaGeN2 crystallizes in the tetragonal P4/nmm space group. Ca(1) is bonded to five equivalent N(2) atoms to form a mixture of corner and edge-sharing CaN5 square pyramids. Ge(1) is bonded in a 5-coordinate geometry to one N(2) and four equivalent N(1) atoms. There are two inequivalent N sites. In the first N site, N(1) is bonded to four equivalent Ge(1) atoms to form distorted NGe4 trigonal pyramids that share corners with four equivalent N(2)Ca5Ge octahedra, corners with four equivalent N(1)Ge4 trigonal pyramids, and edges with four equivalent N(1)Ge4 trigonal pyramids. The corner-sharing octahedral tilt angles are 66°. In the second N site, N(2) is bonded to five equivalent Ca(1) and one Ge(1) atom to form NCa5Ge octahedra that share corners with four equivalent N(2)Ca5Ge octahedra, corners with four equivalent N(1)Ge4 trigonal pyramids, and edges with eight equivalent N(2)Ca5Ge octahedra. The corner-sharing octahedral tilt angles are 6°. is represented by the Crystallographic Information File (CIF) [CIF]
data_CaGeN2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.671
_cell_length_b   3.671
_cell_length_c   7.688
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   103.575
_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  0.000  0.500  0.143  1.0
  Ca  Ca1  1  0.500  0.000  0.857  1.0
  Ge  Ge2  1  0.000  0.500  0.604  1.0
  Ge  Ge3  1  0.500  0.000  0.396  1.0
  N  N4  1  0.000  0.000  0.500  1.0
  N  N5  1  0.500  0.500  0.500  1.0
  N  N6  1  0.000  0.500  0.840  1.0
  N  N7  1  0.500  0.000  0.160  1.0
[/CIF]
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