The structure described by K2SnSi3O9 crystallizes in the hexagonal P6_3/m space group. K(1) is bonded in a 9-coordinate geometry to three equivalent O(2) and six equivalent O(1) atoms. Sn(1) is bonded to six equivalent O(1) atoms to form SnO6 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 two equivalent Sn(1)O6 octahedra and corners with two equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 41°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent K(1), one Sn(1), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to two equivalent K(1) and two equivalent Si(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2Si3SnO9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.969
_cell_length_b   6.969
_cell_length_c   10.171
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   427.721
_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  0.333  0.667  0.057  1.0
  K  K1  1  0.667  0.333  0.557  1.0
  K  K2  1  0.333  0.667  0.443  1.0
  K  K3  1  0.667  0.333  0.943  1.0
  Si  Si4  1  0.617  0.746  0.750  1.0
  Si  Si5  1  0.871  0.617  0.250  1.0
  Si  Si6  1  0.746  0.129  0.250  1.0
  Si  Si7  1  0.254  0.871  0.750  1.0
  Si  Si8  1  0.129  0.383  0.750  1.0
  Si  Si9  1  0.383  0.254  0.250  1.0
  Sn  Sn10  1  0.000  0.000  0.000  1.0
  Sn  Sn11  1  0.000  0.000  0.500  1.0
  O  O12  1  0.256  0.237  0.386  1.0
  O  O13  1  0.019  0.256  0.886  1.0
  O  O14  1  0.237  0.981  0.886  1.0
  O  O15  1  0.763  0.019  0.386  1.0
  O  O16  1  0.981  0.744  0.386  1.0
  O  O17  1  0.744  0.763  0.886  1.0
  O  O18  1  0.744  0.763  0.614  1.0
  O  O19  1  0.981  0.744  0.114  1.0
  O  O20  1  0.763  0.019  0.114  1.0
  O  O21  1  0.237  0.981  0.614  1.0
  O  O22  1  0.019  0.256  0.614  1.0
  O  O23  1  0.256  0.237  0.114  1.0
  O  O24  1  0.487  0.086  0.250  1.0
  O  O25  1  0.401  0.487  0.750  1.0
  O  O26  1  0.086  0.599  0.750  1.0
  O  O27  1  0.914  0.401  0.250  1.0
  O  O28  1  0.599  0.513  0.250  1.0
  O  O29  1  0.513  0.914  0.750  1.0
[/CIF]
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The structure described by K2SnSi3O9 crystallizes in the hexagonal P6_3/m space group. K(1) is bonded in a 9-coordinate geometry to three equivalent O(2) and six equivalent O(1) atoms. Sn(1) is bonded to six equivalent O(1) atoms to form SnO6 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 two equivalent Sn(1)O6 octahedra and corners with two equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 41°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent K(1), one Sn(1), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to two equivalent K(1) and two equivalent Si(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2Si3SnO9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.969
_cell_length_b   6.969
_cell_length_c   10.171
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   427.721
_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  0.333  0.667  0.057  1.0
  K  K1  1  0.667  0.333  0.557  1.0
  K  K2  1  0.333  0.667  0.443  1.0
  K  K3  1  0.667  0.333  0.943  1.0
  Si  Si4  1  0.617  0.746  0.750  1.0
  Si  Si5  1  0.871  0.617  0.250  1.0
  Si  Si6  1  0.746  0.129  0.250  1.0
  Si  Si7  1  0.254  0.871  0.750  1.0
  Si  Si8  1  0.129  0.383  0.750  1.0
  Si  Si9  1  0.383  0.254  0.250  1.0
  Sn  Sn10  1  0.000  0.000  0.000  1.0
  Sn  Sn11  1  0.000  0.000  0.500  1.0
  O  O12  1  0.256  0.237  0.386  1.0
  O  O13  1  0.019  0.256  0.886  1.0
  O  O14  1  0.237  0.981  0.886  1.0
  O  O15  1  0.763  0.019  0.386  1.0
  O  O16  1  0.981  0.744  0.386  1.0
  O  O17  1  0.744  0.763  0.886  1.0
  O  O18  1  0.744  0.763  0.614  1.0
  O  O19  1  0.981  0.744  0.114  1.0
  O  O20  1  0.763  0.019  0.114  1.0
  O  O21  1  0.237  0.981  0.614  1.0
  O  O22  1  0.019  0.256  0.614  1.0
  O  O23  1  0.256  0.237  0.114  1.0
  O  O24  1  0.487  0.086  0.250  1.0
  O  O25  1  0.401  0.487  0.750  1.0
  O  O26  1  0.086  0.599  0.750  1.0
  O  O27  1  0.914  0.401  0.250  1.0
  O  O28  1  0.599  0.513  0.250  1.0
  O  O29  1  0.513  0.914  0.750  1.0
[/CIF]
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