The structure described by K3NaSi3(GeO6)2 crystallizes in the trigonal R-3c space group. K(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. Na(1) is bonded in a distorted hexagonal planar geometry to six equivalent O(2) atoms. Ge(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form GeO6 octahedra that share corners with six equivalent Si(1)O4 tetrahedra. Si(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form SiO4 tetrahedra that share corners with four equivalent Ge(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-34°. There are two inequivalent O sites. In the first O site, O(2) is bonded to two equivalent K(1), one Na(1), one Ge(1), and one Si(1) atom to form a mixture of distorted corner, edge, and face-sharing OK2NaSiGe trigonal bipyramids. In the second O site, O(1) is bonded in a 2-coordinate geometry to two equivalent K(1), one Ge(1), and one Si(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K3NaSi3(GeO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.961
_cell_length_b   8.961
_cell_length_c   8.961
_cell_angle_alpha   60.833
_cell_angle_beta   60.833
_cell_angle_gamma   60.833
_symmetry_Int_Tables_number   1
_cell_volume   518.365
_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
  Ge  Ge0  1  0.351  0.351  0.351  1.0
  Ge  Ge1  1  0.851  0.851  0.851  1.0
  Ge  Ge2  1  0.649  0.649  0.649  1.0
  Ge  Ge3  1  0.149  0.149  0.149  1.0
  K  K4  1  0.897  0.603  0.250  1.0
  K  K5  1  0.603  0.250  0.897  1.0
  K  K6  1  0.250  0.897  0.603  1.0
  K  K7  1  0.397  0.750  0.103  1.0
  K  K8  1  0.750  0.103  0.397  1.0
  K  K9  1  0.103  0.397  0.750  1.0
  Na  Na10  1  0.500  0.500  0.500  1.0
  Na  Na11  1  0.000  0.000  0.000  1.0
  O  O12  1  0.507  0.145  0.275  1.0
  O  O13  1  0.145  0.275  0.507  1.0
  O  O14  1  0.275  0.507  0.145  1.0
  O  O15  1  0.007  0.775  0.645  1.0
  O  O16  1  0.775  0.645  0.007  1.0
  O  O17  1  0.645  0.007  0.775  1.0
  O  O18  1  0.493  0.855  0.725  1.0
  O  O19  1  0.855  0.725  0.493  1.0
  O  O20  1  0.725  0.493  0.855  1.0
  O  O21  1  0.993  0.225  0.355  1.0
  O  O22  1  0.225  0.355  0.993  1.0
  O  O23  1  0.355  0.993  0.225  1.0
  O  O24  1  0.427  0.228  0.574  1.0
  O  O25  1  0.228  0.574  0.427  1.0
  O  O26  1  0.574  0.427  0.228  1.0
  O  O27  1  0.927  0.074  0.728  1.0
  O  O28  1  0.074  0.728  0.927  1.0
  O  O29  1  0.728  0.927  0.074  1.0
  O  O30  1  0.573  0.772  0.426  1.0
  O  O31  1  0.772  0.426  0.573  1.0
  O  O32  1  0.426  0.573  0.772  1.0
  O  O33  1  0.073  0.926  0.272  1.0
  O  O34  1  0.926  0.272  0.073  1.0
  O  O35  1  0.272  0.073  0.926  1.0
  Si  Si36  1  0.541  0.959  0.250  1.0
  Si  Si37  1  0.959  0.250  0.541  1.0
  Si  Si38  1  0.250  0.541  0.959  1.0
  Si  Si39  1  0.041  0.750  0.459  1.0
  Si  Si40  1  0.750  0.459  0.041  1.0
  Si  Si41  1  0.459  0.041  0.750  1.0
[/CIF]
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The structure described by K3NaSi3(GeO6)2 crystallizes in the trigonal R-3c space group. K(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. Na(1) is bonded in a distorted hexagonal planar geometry to six equivalent O(2) atoms. Ge(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form GeO6 octahedra that share corners with six equivalent Si(1)O4 tetrahedra. Si(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form SiO4 tetrahedra that share corners with four equivalent Ge(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-34°. There are two inequivalent O sites. In the first O site, O(2) is bonded to two equivalent K(1), one Na(1), one Ge(1), and one Si(1) atom to form a mixture of distorted corner, edge, and face-sharing OK2NaSiGe trigonal bipyramids. In the second O site, O(1) is bonded in a 2-coordinate geometry to two equivalent K(1), one Ge(1), and one Si(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K3NaSi3(GeO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.961
_cell_length_b   8.961
_cell_length_c   8.961
_cell_angle_alpha   60.833
_cell_angle_beta   60.833
_cell_angle_gamma   60.833
_symmetry_Int_Tables_number   1
_cell_volume   518.365
_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
  Ge  Ge0  1  0.351  0.351  0.351  1.0
  Ge  Ge1  1  0.851  0.851  0.851  1.0
  Ge  Ge2  1  0.649  0.649  0.649  1.0
  Ge  Ge3  1  0.149  0.149  0.149  1.0
  K  K4  1  0.897  0.603  0.250  1.0
  K  K5  1  0.603  0.250  0.897  1.0
  K  K6  1  0.250  0.897  0.603  1.0
  K  K7  1  0.397  0.750  0.103  1.0
  K  K8  1  0.750  0.103  0.397  1.0
  K  K9  1  0.103  0.397  0.750  1.0
  Na  Na10  1  0.500  0.500  0.500  1.0
  Na  Na11  1  0.000  0.000  0.000  1.0
  O  O12  1  0.507  0.145  0.275  1.0
  O  O13  1  0.145  0.275  0.507  1.0
  O  O14  1  0.275  0.507  0.145  1.0
  O  O15  1  0.007  0.775  0.645  1.0
  O  O16  1  0.775  0.645  0.007  1.0
  O  O17  1  0.645  0.007  0.775  1.0
  O  O18  1  0.493  0.855  0.725  1.0
  O  O19  1  0.855  0.725  0.493  1.0
  O  O20  1  0.725  0.493  0.855  1.0
  O  O21  1  0.993  0.225  0.355  1.0
  O  O22  1  0.225  0.355  0.993  1.0
  O  O23  1  0.355  0.993  0.225  1.0
  O  O24  1  0.427  0.228  0.574  1.0
  O  O25  1  0.228  0.574  0.427  1.0
  O  O26  1  0.574  0.427  0.228  1.0
  O  O27  1  0.927  0.074  0.728  1.0
  O  O28  1  0.074  0.728  0.927  1.0
  O  O29  1  0.728  0.927  0.074  1.0
  O  O30  1  0.573  0.772  0.426  1.0
  O  O31  1  0.772  0.426  0.573  1.0
  O  O32  1  0.426  0.573  0.772  1.0
  O  O33  1  0.073  0.926  0.272  1.0
  O  O34  1  0.926  0.272  0.073  1.0
  O  O35  1  0.272  0.073  0.926  1.0
  Si  Si36  1  0.541  0.959  0.250  1.0
  Si  Si37  1  0.959  0.250  0.541  1.0
  Si  Si38  1  0.250  0.541  0.959  1.0
  Si  Si39  1  0.041  0.750  0.459  1.0
  Si  Si40  1  0.750  0.459  0.041  1.0
  Si  Si41  1  0.459  0.041  0.750  1.0
[/CIF]
.