The compound described by K2Ge3(BO5)2 crystallizes in the monoclinic C2 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 10-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(6), one O(8), and three equivalent O(9) atoms. In the second K site, K(2) is bonded in a 9-coordinate geometry to one O(1), one O(4), one O(6), one O(8), two equivalent O(7), and three equivalent O(5) atoms. There are two inequivalent B sites. In the first B site, B(1) is bonded to one O(2), one O(5), one O(7), and one O(8) atom to form BO4 tetrahedra that share  a cornercorner with one Ge(2)O4 tetrahedra,  a cornercorner with one Ge(4)O4 tetrahedra, and corners with two equivalent Ge(3)O4 tetrahedra. In the second B site, B(2) is bonded to one O(10), one O(3), one O(4), and one O(9) atom to form BO4 tetrahedra that share  a cornercorner with one Ge(1)O4 tetrahedra,  a cornercorner with one Ge(3)O4 tetrahedra, and corners with two equivalent Ge(2)O4 tetrahedra. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to two equivalent O(4) and two equivalent O(6) atoms to form GeO4 tetrahedra that share corners with two equivalent B(2)O4 tetrahedra and corners with two equivalent Ge(2)O4 tetrahedra. In the second Ge site, Ge(2) is bonded to one O(10), one O(3), one O(5), and one O(6) atom to form GeO4 tetrahedra that share  a cornercorner with one B(1)O4 tetrahedra,  a cornercorner with one Ge(1)O4 tetrahedra, and corners with two equivalent B(2)O4 tetrahedra. In the third Ge site, Ge(3) is bonded to one O(1), one O(2), one O(7), and one O(9) atom to form GeO4 tetrahedra that share  a cornercorner with one B(2)O4 tetrahedra,  a cornercorner with one Ge(4)O4 tetrahedra, and corners with two equivalent B(1)O4 tetrahedra. In the fourth Ge site, Ge(4) is bonded to two equivalent O(1) and two equivalent O(8) atoms to form GeO4 tetrahedra that share corners with two equivalent B(1)O4 tetrahedra and corners with two equivalent Ge(3)O4 tetrahedra. There are ten inequivalent O sites. In the first O site, O(5) is bonded in a distorted bent 120 degrees geometry to three equivalent K(2), one B(1), and one Ge(2) atom. In the second O site, O(6) is bonded in a distorted bent 120 degrees geometry to one K(1), one K(2), one Ge(1), and one Ge(2) atom. In the third O site, O(7) is bonded in a distorted bent 120 degrees geometry to two equivalent K(2), one B(1), and one Ge(3) atom. In the fourth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one K(1), one K(2), one B(1), and one Ge(4) atom. In the fifth O site, O(9) is bonded in a 2-coordinate geometry to three equivalent K(1), one B(2), and one Ge(3) atom. In the sixth O site, O(10) is bonded in a bent 120 degrees geometry to one K(1), one B(2), and one Ge(2) atom. In the seventh O site, O(1) is bonded in a 2-coordinate geometry to one K(1), one K(2), one Ge(3), and one Ge(4) atom. In the eighth O site, O(2) is bonded in a distorted bent 120 degrees geometry to one K(1), one B(1), and one Ge(3) atom. In the ninth O site, O(3) is bonded in a distorted bent 120 degrees geometry to one K(1), one B(2), and one Ge(2) atom. In the tenth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one K(1), one K(2), one B(2), and one Ge(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2Ge3(BO5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.651
_cell_length_b   8.651
_cell_length_c   12.059
_cell_angle_alpha   51.957
_cell_angle_beta   51.957
_cell_angle_gamma   42.452
_symmetry_Int_Tables_number   1
_cell_volume   457.045
_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  0.685  0.792  0.114  1.0
  K  K1  1  0.343  0.956  0.613  1.0
  K  K2  1  0.208  0.315  0.886  1.0
  K  K3  1  0.044  0.657  0.387  1.0
  Ge  Ge4  1  0.103  0.897  0.000  1.0
  Ge  Ge5  1  0.720  0.363  0.824  1.0
  Ge  Ge6  1  0.055  0.193  0.316  1.0
  Ge  Ge7  1  0.358  0.642  0.500  1.0
  Ge  Ge8  1  0.807  0.945  0.684  1.0
  Ge  Ge9  1  0.637  0.280  0.176  1.0
  B  B10  1  0.780  0.376  0.559  1.0
  B  B11  1  0.595  0.686  0.923  1.0
  B  B12  1  0.624  0.220  0.441  1.0
  B  B13  1  0.314  0.405  0.077  1.0
  O  O14  1  0.124  0.741  0.659  1.0
  O  O15  1  0.775  0.312  0.324  1.0
  O  O16  1  0.778  0.494  0.852  1.0
  O  O17  1  0.128  0.628  0.122  1.0
  O  O18  1  0.688  0.225  0.676  1.0
  O  O19  1  0.559  0.189  0.370  1.0
  O  O20  1  0.506  0.222  0.148  1.0
  O  O21  1  0.259  0.876  0.341  1.0
  O  O22  1  0.957  0.065  0.114  1.0
  O  O23  1  0.020  0.250  0.452  1.0
  O  O24  1  0.372  0.872  0.878  1.0
  O  O25  1  0.602  0.607  0.477  1.0
  O  O26  1  0.694  0.814  0.872  1.0
  O  O27  1  0.543  0.582  0.087  1.0
  O  O28  1  0.418  0.457  0.913  1.0
  O  O29  1  0.393  0.398  0.523  1.0
  O  O30  1  0.750  0.980  0.548  1.0
  O  O31  1  0.186  0.306  0.128  1.0
  O  O32  1  0.811  0.441  0.630  1.0
  O  O33  1  0.935  0.043  0.886  1.0
[/CIF]
.
The compound described by K2Ge3(BO5)2 crystallizes in the monoclinic C2 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 10-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(6), one O(8), and three equivalent O(9) atoms. In the second K site, K(2) is bonded in a 9-coordinate geometry to one O(1), one O(4), one O(6), one O(8), two equivalent O(7), and three equivalent O(5) atoms. There are two inequivalent B sites. In the first B site, B(1) is bonded to one O(2), one O(5), one O(7), and one O(8) atom to form BO4 tetrahedra that share  a cornercorner with one Ge(2)O4 tetrahedra,  a cornercorner with one Ge(4)O4 tetrahedra, and corners with two equivalent Ge(3)O4 tetrahedra. In the second B site, B(2) is bonded to one O(10), one O(3), one O(4), and one O(9) atom to form BO4 tetrahedra that share  a cornercorner with one Ge(1)O4 tetrahedra,  a cornercorner with one Ge(3)O4 tetrahedra, and corners with two equivalent Ge(2)O4 tetrahedra. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to two equivalent O(4) and two equivalent O(6) atoms to form GeO4 tetrahedra that share corners with two equivalent B(2)O4 tetrahedra and corners with two equivalent Ge(2)O4 tetrahedra. In the second Ge site, Ge(2) is bonded to one O(10), one O(3), one O(5), and one O(6) atom to form GeO4 tetrahedra that share  a cornercorner with one B(1)O4 tetrahedra,  a cornercorner with one Ge(1)O4 tetrahedra, and corners with two equivalent B(2)O4 tetrahedra. In the third Ge site, Ge(3) is bonded to one O(1), one O(2), one O(7), and one O(9) atom to form GeO4 tetrahedra that share  a cornercorner with one B(2)O4 tetrahedra,  a cornercorner with one Ge(4)O4 tetrahedra, and corners with two equivalent B(1)O4 tetrahedra. In the fourth Ge site, Ge(4) is bonded to two equivalent O(1) and two equivalent O(8) atoms to form GeO4 tetrahedra that share corners with two equivalent B(1)O4 tetrahedra and corners with two equivalent Ge(3)O4 tetrahedra. There are ten inequivalent O sites. In the first O site, O(5) is bonded in a distorted bent 120 degrees geometry to three equivalent K(2), one B(1), and one Ge(2) atom. In the second O site, O(6) is bonded in a distorted bent 120 degrees geometry to one K(1), one K(2), one Ge(1), and one Ge(2) atom. In the third O site, O(7) is bonded in a distorted bent 120 degrees geometry to two equivalent K(2), one B(1), and one Ge(3) atom. In the fourth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one K(1), one K(2), one B(1), and one Ge(4) atom. In the fifth O site, O(9) is bonded in a 2-coordinate geometry to three equivalent K(1), one B(2), and one Ge(3) atom. In the sixth O site, O(10) is bonded in a bent 120 degrees geometry to one K(1), one B(2), and one Ge(2) atom. In the seventh O site, O(1) is bonded in a 2-coordinate geometry to one K(1), one K(2), one Ge(3), and one Ge(4) atom. In the eighth O site, O(2) is bonded in a distorted bent 120 degrees geometry to one K(1), one B(1), and one Ge(3) atom. In the ninth O site, O(3) is bonded in a distorted bent 120 degrees geometry to one K(1), one B(2), and one Ge(2) atom. In the tenth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one K(1), one K(2), one B(2), and one Ge(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2Ge3(BO5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.651
_cell_length_b   8.651
_cell_length_c   12.059
_cell_angle_alpha   51.957
_cell_angle_beta   51.957
_cell_angle_gamma   42.452
_symmetry_Int_Tables_number   1
_cell_volume   457.045
_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  0.685  0.792  0.114  1.0
  K  K1  1  0.343  0.956  0.613  1.0
  K  K2  1  0.208  0.315  0.886  1.0
  K  K3  1  0.044  0.657  0.387  1.0
  Ge  Ge4  1  0.103  0.897  0.000  1.0
  Ge  Ge5  1  0.720  0.363  0.824  1.0
  Ge  Ge6  1  0.055  0.193  0.316  1.0
  Ge  Ge7  1  0.358  0.642  0.500  1.0
  Ge  Ge8  1  0.807  0.945  0.684  1.0
  Ge  Ge9  1  0.637  0.280  0.176  1.0
  B  B10  1  0.780  0.376  0.559  1.0
  B  B11  1  0.595  0.686  0.923  1.0
  B  B12  1  0.624  0.220  0.441  1.0
  B  B13  1  0.314  0.405  0.077  1.0
  O  O14  1  0.124  0.741  0.659  1.0
  O  O15  1  0.775  0.312  0.324  1.0
  O  O16  1  0.778  0.494  0.852  1.0
  O  O17  1  0.128  0.628  0.122  1.0
  O  O18  1  0.688  0.225  0.676  1.0
  O  O19  1  0.559  0.189  0.370  1.0
  O  O20  1  0.506  0.222  0.148  1.0
  O  O21  1  0.259  0.876  0.341  1.0
  O  O22  1  0.957  0.065  0.114  1.0
  O  O23  1  0.020  0.250  0.452  1.0
  O  O24  1  0.372  0.872  0.878  1.0
  O  O25  1  0.602  0.607  0.477  1.0
  O  O26  1  0.694  0.814  0.872  1.0
  O  O27  1  0.543  0.582  0.087  1.0
  O  O28  1  0.418  0.457  0.913  1.0
  O  O29  1  0.393  0.398  0.523  1.0
  O  O30  1  0.750  0.980  0.548  1.0
  O  O31  1  0.186  0.306  0.128  1.0
  O  O32  1  0.811  0.441  0.630  1.0
  O  O33  1  0.935  0.043  0.886  1.0
[/CIF]
.