The compound described by K2ZnSi3O8 crystallizes in the triclinic P1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and two equivalent O(6) atoms. In the second K site, K(2) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom. Zn(1) is bonded to one O(2), one O(4), one O(6), and one O(7) atom to form ZnO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(3), one O(5), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Zn(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(1), one O(3), one O(6), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Zn(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. In the third Si site, Si(3) is bonded to one O(2), one O(4), one O(5), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, and corners with two equivalent Zn(1)O4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one K(1), one K(2), one Si(1), and one Si(2) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Zn(1), and one Si(3) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one K(1), one K(2), one Si(1), and one Si(2) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Zn(1), and one Si(3) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one K(1), one Si(1), and one Si(3) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to two equivalent K(1), one Zn(1), and one Si(2) atom. In the seventh O site, O(7) is bonded in a 2-coordinate geometry to one K(2), one Zn(1), and one Si(1) atom. In the eighth O site, O(8) is bonded in a 2-coordinate geometry to one K(2), one Si(2), and one Si(3) atom. is represented by the CIF file [CIF]
data_K2ZnSi3O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.369
_cell_length_b   6.832
_cell_length_c   6.906
_cell_angle_alpha   76.380
_cell_angle_beta   68.523
_cell_angle_gamma   67.358
_symmetry_Int_Tables_number   1
_cell_volume   216.210
_cell_formula_units_Z   1
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  0.948  0.292  0.818  1.0
  K  K1  1  0.121  0.670  0.138  1.0
  Zn  Zn2  1  0.666  0.881  0.778  1.0
  Si  Si3  1  0.321  0.094  0.258  1.0
  Si  Si4  1  0.659  0.295  0.397  1.0
  Si  Si5  1  0.338  0.705  0.610  1.0
  O  O6  1  0.997  0.264  0.256  1.0
  O  O7  1  0.529  0.661  0.758  1.0
  O  O8  1  0.511  0.245  0.246  1.0
  O  O9  1  0.042  0.670  0.751  1.0
  O  O10  1  0.283  0.953  0.488  1.0
  O  O11  1  0.620  0.163  0.623  1.0
  O  O12  1  0.459  0.957  0.066  1.0
  O  O13  1  0.506  0.554  0.411  1.0
[/CIF]
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The compound described by K2ZnSi3O8 crystallizes in the triclinic P1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and two equivalent O(6) atoms. In the second K site, K(2) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom. Zn(1) is bonded to one O(2), one O(4), one O(6), and one O(7) atom to form ZnO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(3), one O(5), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Zn(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(1), one O(3), one O(6), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Zn(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. In the third Si site, Si(3) is bonded to one O(2), one O(4), one O(5), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, and corners with two equivalent Zn(1)O4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one K(1), one K(2), one Si(1), and one Si(2) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Zn(1), and one Si(3) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one K(1), one K(2), one Si(1), and one Si(2) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Zn(1), and one Si(3) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one K(1), one Si(1), and one Si(3) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to two equivalent K(1), one Zn(1), and one Si(2) atom. In the seventh O site, O(7) is bonded in a 2-coordinate geometry to one K(2), one Zn(1), and one Si(1) atom. In the eighth O site, O(8) is bonded in a 2-coordinate geometry to one K(2), one Si(2), and one Si(3) atom. is represented by the CIF file [CIF]
data_K2ZnSi3O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.369
_cell_length_b   6.832
_cell_length_c   6.906
_cell_angle_alpha   76.380
_cell_angle_beta   68.523
_cell_angle_gamma   67.358
_symmetry_Int_Tables_number   1
_cell_volume   216.210
_cell_formula_units_Z   1
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  0.948  0.292  0.818  1.0
  K  K1  1  0.121  0.670  0.138  1.0
  Zn  Zn2  1  0.666  0.881  0.778  1.0
  Si  Si3  1  0.321  0.094  0.258  1.0
  Si  Si4  1  0.659  0.295  0.397  1.0
  Si  Si5  1  0.338  0.705  0.610  1.0
  O  O6  1  0.997  0.264  0.256  1.0
  O  O7  1  0.529  0.661  0.758  1.0
  O  O8  1  0.511  0.245  0.246  1.0
  O  O9  1  0.042  0.670  0.751  1.0
  O  O10  1  0.283  0.953  0.488  1.0
  O  O11  1  0.620  0.163  0.623  1.0
  O  O12  1  0.459  0.957  0.066  1.0
  O  O13  1  0.506  0.554  0.411  1.0
[/CIF]
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