The crystal structure described by LiKSi2O5 crystallizes in the monoclinic P2_1 space group. K(1) is bonded in a 9-coordinate geometry to two equivalent O(1), two equivalent O(4), two equivalent O(5), and three equivalent O(2) atoms. Li(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form LiO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, and corners with four equivalent Si(1)O4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(5), and two equivalent O(3) atoms to form SiO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with four equivalent Li(1)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(2), one O(5), and two equivalent O(4) atoms to form SiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent K(1), two equivalent Li(1), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to three equivalent K(1), one Li(1), and one Si(2) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Li(1) and two equivalent Si(1) atoms. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to two equivalent K(1) and two equivalent Si(2) atoms. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to two equivalent K(1), one Si(1), and one Si(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_KLiSi2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.875
_cell_length_b   6.085
_cell_length_c   8.304
_cell_angle_alpha   86.562
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   245.844
_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  0.313  0.029  0.314  1.0
  K  K1  1  0.813  0.971  0.686  1.0
  Li  Li2  1  0.299  0.130  0.906  1.0
  Li  Li3  1  0.799  0.870  0.094  1.0
  Si  Si4  1  0.780  0.370  0.064  1.0
  Si  Si5  1  0.865  0.559  0.394  1.0
  Si  Si6  1  0.365  0.441  0.606  1.0
  Si  Si7  1  0.280  0.630  0.936  1.0
  O  O8  1  0.653  0.146  0.008  1.0
  O  O9  1  0.809  0.807  0.329  1.0
  O  O10  1  0.602  0.594  0.001  1.0
  O  O11  1  0.193  0.519  0.440  1.0
  O  O12  1  0.293  0.630  0.737  1.0
  O  O13  1  0.793  0.370  0.263  1.0
  O  O14  1  0.102  0.406  0.999  1.0
  O  O15  1  0.693  0.481  0.560  1.0
  O  O16  1  0.309  0.193  0.671  1.0
  O  O17  1  0.153  0.854  0.992  1.0
[/CIF]
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The crystal structure described by LiKSi2O5 crystallizes in the monoclinic P2_1 space group. K(1) is bonded in a 9-coordinate geometry to two equivalent O(1), two equivalent O(4), two equivalent O(5), and three equivalent O(2) atoms. Li(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form LiO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, and corners with four equivalent Si(1)O4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(5), and two equivalent O(3) atoms to form SiO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with four equivalent Li(1)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(2), one O(5), and two equivalent O(4) atoms to form SiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent K(1), two equivalent Li(1), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to three equivalent K(1), one Li(1), and one Si(2) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Li(1) and two equivalent Si(1) atoms. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to two equivalent K(1) and two equivalent Si(2) atoms. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to two equivalent K(1), one Si(1), and one Si(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_KLiSi2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.875
_cell_length_b   6.085
_cell_length_c   8.304
_cell_angle_alpha   86.562
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   245.844
_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  0.313  0.029  0.314  1.0
  K  K1  1  0.813  0.971  0.686  1.0
  Li  Li2  1  0.299  0.130  0.906  1.0
  Li  Li3  1  0.799  0.870  0.094  1.0
  Si  Si4  1  0.780  0.370  0.064  1.0
  Si  Si5  1  0.865  0.559  0.394  1.0
  Si  Si6  1  0.365  0.441  0.606  1.0
  Si  Si7  1  0.280  0.630  0.936  1.0
  O  O8  1  0.653  0.146  0.008  1.0
  O  O9  1  0.809  0.807  0.329  1.0
  O  O10  1  0.602  0.594  0.001  1.0
  O  O11  1  0.193  0.519  0.440  1.0
  O  O12  1  0.293  0.630  0.737  1.0
  O  O13  1  0.793  0.370  0.263  1.0
  O  O14  1  0.102  0.406  0.999  1.0
  O  O15  1  0.693  0.481  0.560  1.0
  O  O16  1  0.309  0.193  0.671  1.0
  O  O17  1  0.153  0.854  0.992  1.0
[/CIF]
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