The material described by KGe2(PO4)3 crystallizes in the trigonal R-3 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded to six equivalent O(2) and six equivalent O(4) atoms to form distorted KO12 cuboctahedra that share corners with six equivalent Ge(2)O6 octahedra, edges with six equivalent P(1)O4 tetrahedra, and faces with two equivalent Ge(1)O6 octahedra. The corner-sharing octahedral tilt angles are 49°. In the second K site, K(2) is bonded to six equivalent O(1) atoms to form distorted KO6 cuboctahedra that share corners with six equivalent P(1)O4 tetrahedra and faces with two equivalent Ge(2)O6 octahedra. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to three equivalent O(2) and three equivalent O(3) atoms to form GeO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra and  a faceface with one K(1)O12 cuboctahedra. In the second Ge site, Ge(2) is bonded to three equivalent O(1) and three equivalent O(4) atoms to form GeO6 octahedra that share corners with three equivalent K(1)O12 cuboctahedra, corners with six equivalent P(1)O4 tetrahedra, and  a faceface with one K(2)O6 cuboctahedra. P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one K(2)O6 cuboctahedra, corners with two equivalent Ge(1)O6 octahedra, corners with two equivalent Ge(2)O6 octahedra, and  an edgeedge with one K(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 32-45°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one K(2), one Ge(2), and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one K(1), one Ge(1), and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Ge(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one K(1), one Ge(2), and one P(1) atom. is represented by the CIF card [CIF]
data_KGe2(PO4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.951
_cell_length_b   8.951
_cell_length_c   8.951
_cell_angle_alpha   54.027
_cell_angle_beta   54.027
_cell_angle_gamma   54.027
_symmetry_Int_Tables_number   1
_cell_volume   436.432
_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
  K  K0  1  0.000  0.000  0.000  1.0
  K  K1  1  0.500  0.500  0.500  1.0
  Ge  Ge2  1  0.148  0.148  0.148  1.0
  Ge  Ge3  1  0.852  0.852  0.852  1.0
  Ge  Ge4  1  0.347  0.347  0.347  1.0
  Ge  Ge5  1  0.653  0.653  0.653  1.0
  P  P6  1  0.252  0.534  0.966  1.0
  P  P7  1  0.534  0.966  0.252  1.0
  P  P8  1  0.966  0.252  0.534  1.0
  P  P9  1  0.748  0.466  0.034  1.0
  P  P10  1  0.466  0.034  0.748  1.0
  P  P11  1  0.034  0.748  0.466  1.0
  O  O12  1  0.813  0.464  0.528  1.0
  O  O13  1  0.464  0.528  0.813  1.0
  O  O14  1  0.528  0.813  0.464  1.0
  O  O15  1  0.187  0.536  0.472  1.0
  O  O16  1  0.536  0.472  0.187  1.0
  O  O17  1  0.472  0.187  0.536  1.0
  O  O18  1  0.905  0.268  0.112  1.0
  O  O19  1  0.268  0.112  0.905  1.0
  O  O20  1  0.112  0.905  0.268  1.0
  O  O21  1  0.095  0.732  0.888  1.0
  O  O22  1  0.732  0.888  0.095  1.0
  O  O23  1  0.888  0.095  0.732  1.0
  O  O24  1  0.016  0.768  0.636  1.0
  O  O25  1  0.636  0.016  0.768  1.0
  O  O26  1  0.768  0.636  0.016  1.0
  O  O27  1  0.984  0.232  0.364  1.0
  O  O28  1  0.364  0.984  0.232  1.0
  O  O29  1  0.232  0.364  0.984  1.0
  O  O30  1  0.522  0.165  0.215  1.0
  O  O31  1  0.215  0.522  0.165  1.0
  O  O32  1  0.165  0.215  0.522  1.0
  O  O33  1  0.478  0.835  0.785  1.0
  O  O34  1  0.785  0.478  0.835  1.0
  O  O35  1  0.835  0.785  0.478  1.0
[/CIF]
.
The material described by KGe2(PO4)3 crystallizes in the trigonal R-3 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded to six equivalent O(2) and six equivalent O(4) atoms to form distorted KO12 cuboctahedra that share corners with six equivalent Ge(2)O6 octahedra, edges with six equivalent P(1)O4 tetrahedra, and faces with two equivalent Ge(1)O6 octahedra. The corner-sharing octahedral tilt angles are 49°. In the second K site, K(2) is bonded to six equivalent O(1) atoms to form distorted KO6 cuboctahedra that share corners with six equivalent P(1)O4 tetrahedra and faces with two equivalent Ge(2)O6 octahedra. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to three equivalent O(2) and three equivalent O(3) atoms to form GeO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra and  a faceface with one K(1)O12 cuboctahedra. In the second Ge site, Ge(2) is bonded to three equivalent O(1) and three equivalent O(4) atoms to form GeO6 octahedra that share corners with three equivalent K(1)O12 cuboctahedra, corners with six equivalent P(1)O4 tetrahedra, and  a faceface with one K(2)O6 cuboctahedra. P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one K(2)O6 cuboctahedra, corners with two equivalent Ge(1)O6 octahedra, corners with two equivalent Ge(2)O6 octahedra, and  an edgeedge with one K(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 32-45°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one K(2), one Ge(2), and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one K(1), one Ge(1), and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Ge(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one K(1), one Ge(2), and one P(1) atom. is represented by the CIF card [CIF]
data_KGe2(PO4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.951
_cell_length_b   8.951
_cell_length_c   8.951
_cell_angle_alpha   54.027
_cell_angle_beta   54.027
_cell_angle_gamma   54.027
_symmetry_Int_Tables_number   1
_cell_volume   436.432
_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
  K  K0  1  0.000  0.000  0.000  1.0
  K  K1  1  0.500  0.500  0.500  1.0
  Ge  Ge2  1  0.148  0.148  0.148  1.0
  Ge  Ge3  1  0.852  0.852  0.852  1.0
  Ge  Ge4  1  0.347  0.347  0.347  1.0
  Ge  Ge5  1  0.653  0.653  0.653  1.0
  P  P6  1  0.252  0.534  0.966  1.0
  P  P7  1  0.534  0.966  0.252  1.0
  P  P8  1  0.966  0.252  0.534  1.0
  P  P9  1  0.748  0.466  0.034  1.0
  P  P10  1  0.466  0.034  0.748  1.0
  P  P11  1  0.034  0.748  0.466  1.0
  O  O12  1  0.813  0.464  0.528  1.0
  O  O13  1  0.464  0.528  0.813  1.0
  O  O14  1  0.528  0.813  0.464  1.0
  O  O15  1  0.187  0.536  0.472  1.0
  O  O16  1  0.536  0.472  0.187  1.0
  O  O17  1  0.472  0.187  0.536  1.0
  O  O18  1  0.905  0.268  0.112  1.0
  O  O19  1  0.268  0.112  0.905  1.0
  O  O20  1  0.112  0.905  0.268  1.0
  O  O21  1  0.095  0.732  0.888  1.0
  O  O22  1  0.732  0.888  0.095  1.0
  O  O23  1  0.888  0.095  0.732  1.0
  O  O24  1  0.016  0.768  0.636  1.0
  O  O25  1  0.636  0.016  0.768  1.0
  O  O26  1  0.768  0.636  0.016  1.0
  O  O27  1  0.984  0.232  0.364  1.0
  O  O28  1  0.364  0.984  0.232  1.0
  O  O29  1  0.232  0.364  0.984  1.0
  O  O30  1  0.522  0.165  0.215  1.0
  O  O31  1  0.215  0.522  0.165  1.0
  O  O32  1  0.165  0.215  0.522  1.0
  O  O33  1  0.478  0.835  0.785  1.0
  O  O34  1  0.785  0.478  0.835  1.0
  O  O35  1  0.835  0.785  0.478  1.0
[/CIF]
.