The crystal structure described by Ca3(GeP2)2 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Ca sites. In the first Ca site, Ca(1) is bonded to one P(1), one P(4), two equivalent P(2), and two equivalent P(3) atoms to form a mixture of distorted edge and corner-sharing CaP6 octahedra. The corner-sharing octahedral tilt angles range from 5-9°. In the second Ca site, Ca(2) is bonded to one P(2), one P(3), two equivalent P(1), and two equivalent P(4) atoms to form a mixture of distorted edge and corner-sharing CaP6 octahedra. The corner-sharing octahedral tilt angles range from 1-7°. In the third Ca site, Ca(3) is bonded to one P(2), one P(3), two equivalent P(1), and two equivalent P(4) atoms to form a mixture of edge and corner-sharing CaP6 octahedra. The corner-sharing octahedral tilt angles range from 1-9°. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 3-coordinate geometry to one Ge(2), one P(1), one P(2), and one P(4) atom. In the second Ge site, Ge(2) is bonded in a 4-coordinate geometry to one Ge(1), one P(2), and two equivalent P(3) atoms. There are four inequivalent P sites. In the first P site, P(1) is bonded to one Ca(1), two equivalent Ca(2), two equivalent Ca(3), and one Ge(1) atom to form PCa5Ge octahedra that share corners with two equivalent P(3)Ca4Ge2 octahedra, corners with two equivalent P(4)Ca5Ge octahedra, corners with three equivalent P(2)Ca4Ge2 octahedra, edges with two equivalent P(2)Ca4Ge2 octahedra, edges with two equivalent P(3)Ca4Ge2 octahedra, edges with two equivalent P(1)Ca5Ge octahedra, and edges with four equivalent P(4)Ca5Ge octahedra. The corner-sharing octahedral tilt angles range from 3-92°. In the second P site, P(2) is bonded to one Ca(2), one Ca(3), two equivalent Ca(1), one Ge(1), and one Ge(2) atom to form PCa4Ge2 octahedra that share  a cornercorner with one P(4)Ca5Ge octahedra, corners with two equivalent P(2)Ca4Ge2 octahedra, corners with two equivalent P(3)Ca4Ge2 octahedra, corners with three equivalent P(1)Ca5Ge octahedra, edges with two equivalent P(1)Ca5Ge octahedra, edges with three equivalent P(3)Ca4Ge2 octahedra, and edges with three equivalent P(4)Ca5Ge octahedra. The corner-sharing octahedral tilt angles range from 5-92°. In the third P site, P(3) is bonded to one Ca(2), one Ca(3), two equivalent Ca(1), and two equivalent Ge(2) atoms to form PCa4Ge2 octahedra that share corners with two equivalent P(2)Ca4Ge2 octahedra, corners with two equivalent P(1)Ca5Ge octahedra, corners with four equivalent P(4)Ca5Ge octahedra,  an edgeedge with one P(4)Ca5Ge octahedra, edges with two equivalent P(3)Ca4Ge2 octahedra, edges with two equivalent P(1)Ca5Ge octahedra, and edges with three equivalent P(2)Ca4Ge2 octahedra. The corner-sharing octahedral tilt angles range from 5-92°. In the fourth P site, P(4) is bonded to one Ca(1), two equivalent Ca(2), two equivalent Ca(3), and one Ge(1) atom to form PCa5Ge octahedra that share  a cornercorner with one P(2)Ca4Ge2 octahedra, corners with two equivalent P(1)Ca5Ge octahedra, corners with four equivalent P(3)Ca4Ge2 octahedra,  an edgeedge with one P(3)Ca4Ge2 octahedra, edges with two equivalent P(4)Ca5Ge octahedra, edges with three equivalent P(2)Ca4Ge2 octahedra, and edges with four equivalent P(1)Ca5Ge octahedra. The corner-sharing octahedral tilt angles range from 3-86°. is represented by the CIF file [CIF]
data_Ca3(GeP2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   17.502
_cell_length_b   7.061
_cell_length_c   7.133
_cell_angle_alpha   68.245
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   818.609
_cell_formula_units_Z   4
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  0.317  0.012  0.785  1.0
  Ca  Ca1  1  0.817  0.488  0.215  1.0
  Ca  Ca2  1  0.061  0.012  0.743  1.0
  Ca  Ca3  1  0.183  0.512  0.785  1.0
  Ca  Ca4  1  0.440  0.996  0.262  1.0
  Ca  Ca5  1  0.940  0.504  0.738  1.0
  Ca  Ca6  1  0.560  0.004  0.738  1.0
  Ca  Ca7  1  0.060  0.496  0.262  1.0
  Ca  Ca8  1  0.439  0.512  0.743  1.0
  Ca  Ca9  1  0.939  0.988  0.257  1.0
  Ca  Ca10  1  0.561  0.488  0.257  1.0
  Ca  Ca11  1  0.683  0.988  0.215  1.0
  Ge  Ge12  1  0.874  0.030  0.791  1.0
  Ge  Ge13  1  0.126  0.970  0.209  1.0
  Ge  Ge14  1  0.626  0.530  0.791  1.0
  Ge  Ge15  1  0.242  0.084  0.319  1.0
  Ge  Ge16  1  0.742  0.416  0.681  1.0
  Ge  Ge17  1  0.758  0.916  0.681  1.0
  Ge  Ge18  1  0.258  0.584  0.319  1.0
  Ge  Ge19  1  0.374  0.470  0.209  1.0
  P  P20  1  0.434  0.255  0.500  1.0
  P  P21  1  0.685  0.723  0.963  1.0
  P  P22  1  0.815  0.223  0.963  1.0
  P  P23  1  0.315  0.277  0.037  1.0
  P  P24  1  0.302  0.773  0.510  1.0
  P  P25  1  0.802  0.727  0.490  1.0
  P  P26  1  0.698  0.227  0.490  1.0
  P  P27  1  0.198  0.273  0.510  1.0
  P  P28  1  0.059  0.250  0.005  1.0
  P  P29  1  0.185  0.777  0.037  1.0
  P  P30  1  0.559  0.250  0.995  1.0
  P  P31  1  0.941  0.750  0.995  1.0
  P  P32  1  0.934  0.245  0.500  1.0
  P  P33  1  0.566  0.745  0.500  1.0
  P  P34  1  0.066  0.755  0.500  1.0
  P  P35  1  0.441  0.750  0.005  1.0
[/CIF]
.
The crystal structure described by Ca3(GeP2)2 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Ca sites. In the first Ca site, Ca(1) is bonded to one P(1), one P(4), two equivalent P(2), and two equivalent P(3) atoms to form a mixture of distorted edge and corner-sharing CaP6 octahedra. The corner-sharing octahedral tilt angles range from 5-9°. In the second Ca site, Ca(2) is bonded to one P(2), one P(3), two equivalent P(1), and two equivalent P(4) atoms to form a mixture of distorted edge and corner-sharing CaP6 octahedra. The corner-sharing octahedral tilt angles range from 1-7°. In the third Ca site, Ca(3) is bonded to one P(2), one P(3), two equivalent P(1), and two equivalent P(4) atoms to form a mixture of edge and corner-sharing CaP6 octahedra. The corner-sharing octahedral tilt angles range from 1-9°. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 3-coordinate geometry to one Ge(2), one P(1), one P(2), and one P(4) atom. In the second Ge site, Ge(2) is bonded in a 4-coordinate geometry to one Ge(1), one P(2), and two equivalent P(3) atoms. There are four inequivalent P sites. In the first P site, P(1) is bonded to one Ca(1), two equivalent Ca(2), two equivalent Ca(3), and one Ge(1) atom to form PCa5Ge octahedra that share corners with two equivalent P(3)Ca4Ge2 octahedra, corners with two equivalent P(4)Ca5Ge octahedra, corners with three equivalent P(2)Ca4Ge2 octahedra, edges with two equivalent P(2)Ca4Ge2 octahedra, edges with two equivalent P(3)Ca4Ge2 octahedra, edges with two equivalent P(1)Ca5Ge octahedra, and edges with four equivalent P(4)Ca5Ge octahedra. The corner-sharing octahedral tilt angles range from 3-92°. In the second P site, P(2) is bonded to one Ca(2), one Ca(3), two equivalent Ca(1), one Ge(1), and one Ge(2) atom to form PCa4Ge2 octahedra that share  a cornercorner with one P(4)Ca5Ge octahedra, corners with two equivalent P(2)Ca4Ge2 octahedra, corners with two equivalent P(3)Ca4Ge2 octahedra, corners with three equivalent P(1)Ca5Ge octahedra, edges with two equivalent P(1)Ca5Ge octahedra, edges with three equivalent P(3)Ca4Ge2 octahedra, and edges with three equivalent P(4)Ca5Ge octahedra. The corner-sharing octahedral tilt angles range from 5-92°. In the third P site, P(3) is bonded to one Ca(2), one Ca(3), two equivalent Ca(1), and two equivalent Ge(2) atoms to form PCa4Ge2 octahedra that share corners with two equivalent P(2)Ca4Ge2 octahedra, corners with two equivalent P(1)Ca5Ge octahedra, corners with four equivalent P(4)Ca5Ge octahedra,  an edgeedge with one P(4)Ca5Ge octahedra, edges with two equivalent P(3)Ca4Ge2 octahedra, edges with two equivalent P(1)Ca5Ge octahedra, and edges with three equivalent P(2)Ca4Ge2 octahedra. The corner-sharing octahedral tilt angles range from 5-92°. In the fourth P site, P(4) is bonded to one Ca(1), two equivalent Ca(2), two equivalent Ca(3), and one Ge(1) atom to form PCa5Ge octahedra that share  a cornercorner with one P(2)Ca4Ge2 octahedra, corners with two equivalent P(1)Ca5Ge octahedra, corners with four equivalent P(3)Ca4Ge2 octahedra,  an edgeedge with one P(3)Ca4Ge2 octahedra, edges with two equivalent P(4)Ca5Ge octahedra, edges with three equivalent P(2)Ca4Ge2 octahedra, and edges with four equivalent P(1)Ca5Ge octahedra. The corner-sharing octahedral tilt angles range from 3-86°. is represented by the CIF file [CIF]
data_Ca3(GeP2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   17.502
_cell_length_b   7.061
_cell_length_c   7.133
_cell_angle_alpha   68.245
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   818.609
_cell_formula_units_Z   4
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  0.317  0.012  0.785  1.0
  Ca  Ca1  1  0.817  0.488  0.215  1.0
  Ca  Ca2  1  0.061  0.012  0.743  1.0
  Ca  Ca3  1  0.183  0.512  0.785  1.0
  Ca  Ca4  1  0.440  0.996  0.262  1.0
  Ca  Ca5  1  0.940  0.504  0.738  1.0
  Ca  Ca6  1  0.560  0.004  0.738  1.0
  Ca  Ca7  1  0.060  0.496  0.262  1.0
  Ca  Ca8  1  0.439  0.512  0.743  1.0
  Ca  Ca9  1  0.939  0.988  0.257  1.0
  Ca  Ca10  1  0.561  0.488  0.257  1.0
  Ca  Ca11  1  0.683  0.988  0.215  1.0
  Ge  Ge12  1  0.874  0.030  0.791  1.0
  Ge  Ge13  1  0.126  0.970  0.209  1.0
  Ge  Ge14  1  0.626  0.530  0.791  1.0
  Ge  Ge15  1  0.242  0.084  0.319  1.0
  Ge  Ge16  1  0.742  0.416  0.681  1.0
  Ge  Ge17  1  0.758  0.916  0.681  1.0
  Ge  Ge18  1  0.258  0.584  0.319  1.0
  Ge  Ge19  1  0.374  0.470  0.209  1.0
  P  P20  1  0.434  0.255  0.500  1.0
  P  P21  1  0.685  0.723  0.963  1.0
  P  P22  1  0.815  0.223  0.963  1.0
  P  P23  1  0.315  0.277  0.037  1.0
  P  P24  1  0.302  0.773  0.510  1.0
  P  P25  1  0.802  0.727  0.490  1.0
  P  P26  1  0.698  0.227  0.490  1.0
  P  P27  1  0.198  0.273  0.510  1.0
  P  P28  1  0.059  0.250  0.005  1.0
  P  P29  1  0.185  0.777  0.037  1.0
  P  P30  1  0.559  0.250  0.995  1.0
  P  P31  1  0.941  0.750  0.995  1.0
  P  P32  1  0.934  0.245  0.500  1.0
  P  P33  1  0.566  0.745  0.500  1.0
  P  P34  1  0.066  0.755  0.500  1.0
  P  P35  1  0.441  0.750  0.005  1.0
[/CIF]
.