The crystal structure described by K3Sr is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent K sites. In the first K site, K(1) is bonded to four equivalent K(1), four equivalent K(2), and four equivalent Sr(1) atoms to form KK8Sr4 cuboctahedra that share corners with twelve equivalent K(1)K8Sr4 cuboctahedra, edges with eight equivalent K(1)K8Sr4 cuboctahedra, edges with eight equivalent K(2)K8Sr4 cuboctahedra, edges with eight equivalent Sr(1)K12 cuboctahedra, faces with four equivalent K(2)K8Sr4 cuboctahedra, faces with four equivalent Sr(1)K12 cuboctahedra, and faces with ten equivalent K(1)K8Sr4 cuboctahedra. In the second K site, K(2) is bonded to eight equivalent K(1) and four equivalent Sr(1) atoms to form distorted KK8Sr4 cuboctahedra that share corners with four equivalent K(2)K8Sr4 cuboctahedra, corners with eight equivalent Sr(1)K12 cuboctahedra, edges with eight equivalent K(2)K8Sr4 cuboctahedra, edges with sixteen equivalent K(1)K8Sr4 cuboctahedra, faces with four equivalent K(2)K8Sr4 cuboctahedra, faces with six equivalent Sr(1)K12 cuboctahedra, and faces with eight equivalent K(1)K8Sr4 cuboctahedra. Sr(1) is bonded to four equivalent K(2) and eight equivalent K(1) atoms to form SrK12 cuboctahedra that share corners with four equivalent Sr(1)K12 cuboctahedra, corners with eight equivalent K(2)K8Sr4 cuboctahedra, edges with eight equivalent Sr(1)K12 cuboctahedra, edges with sixteen equivalent K(1)K8Sr4 cuboctahedra, faces with four equivalent Sr(1)K12 cuboctahedra, faces with six equivalent K(2)K8Sr4 cuboctahedra, and faces with eight equivalent K(1)K8Sr4 cuboctahedra. is represented by the CIF card [CIF]
data_K3Sr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.188
_cell_length_b   8.188
_cell_length_c   8.188
_cell_angle_alpha   134.394
_cell_angle_beta   134.394
_cell_angle_gamma   66.473
_symmetry_Int_Tables_number   1
_cell_volume   275.873
_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  0.750  0.250  0.500  1.0
  K  K1  1  0.250  0.750  0.500  1.0
  K  K2  1  0.500  0.500  0.000  1.0
  Sr  Sr3  1  0.000  0.000  0.000  1.0
[/CIF]
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The crystal structure described by K3Sr is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent K sites. In the first K site, K(1) is bonded to four equivalent K(1), four equivalent K(2), and four equivalent Sr(1) atoms to form KK8Sr4 cuboctahedra that share corners with twelve equivalent K(1)K8Sr4 cuboctahedra, edges with eight equivalent K(1)K8Sr4 cuboctahedra, edges with eight equivalent K(2)K8Sr4 cuboctahedra, edges with eight equivalent Sr(1)K12 cuboctahedra, faces with four equivalent K(2)K8Sr4 cuboctahedra, faces with four equivalent Sr(1)K12 cuboctahedra, and faces with ten equivalent K(1)K8Sr4 cuboctahedra. In the second K site, K(2) is bonded to eight equivalent K(1) and four equivalent Sr(1) atoms to form distorted KK8Sr4 cuboctahedra that share corners with four equivalent K(2)K8Sr4 cuboctahedra, corners with eight equivalent Sr(1)K12 cuboctahedra, edges with eight equivalent K(2)K8Sr4 cuboctahedra, edges with sixteen equivalent K(1)K8Sr4 cuboctahedra, faces with four equivalent K(2)K8Sr4 cuboctahedra, faces with six equivalent Sr(1)K12 cuboctahedra, and faces with eight equivalent K(1)K8Sr4 cuboctahedra. Sr(1) is bonded to four equivalent K(2) and eight equivalent K(1) atoms to form SrK12 cuboctahedra that share corners with four equivalent Sr(1)K12 cuboctahedra, corners with eight equivalent K(2)K8Sr4 cuboctahedra, edges with eight equivalent Sr(1)K12 cuboctahedra, edges with sixteen equivalent K(1)K8Sr4 cuboctahedra, faces with four equivalent Sr(1)K12 cuboctahedra, faces with six equivalent K(2)K8Sr4 cuboctahedra, and faces with eight equivalent K(1)K8Sr4 cuboctahedra. is represented by the CIF card [CIF]
data_K3Sr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.188
_cell_length_b   8.188
_cell_length_c   8.188
_cell_angle_alpha   134.394
_cell_angle_beta   134.394
_cell_angle_gamma   66.473
_symmetry_Int_Tables_number   1
_cell_volume   275.873
_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  0.750  0.250  0.500  1.0
  K  K1  1  0.250  0.750  0.500  1.0
  K  K2  1  0.500  0.500  0.000  1.0
  Sr  Sr3  1  0.000  0.000  0.000  1.0
[/CIF]
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