The compound described by KSm(SO4)2 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 9-coordinate geometry to one O(1), one O(4), one O(7), one O(8), two equivalent O(6), and three equivalent O(3) atoms. Sm(1) is bonded in a 9-coordinate geometry to one O(1), one O(4), one O(8), two equivalent O(2), two equivalent O(5), and two equivalent O(7) atoms. There are two inequivalent S sites. In the first S site, S(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(7) atom. In the second S site, S(2) is bonded in a tetrahedral geometry to one O(4), one O(5), one O(6), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(5) is bonded in a distorted single-bond geometry to two equivalent Sm(1) and one S(2) atom. In the second O site, O(6) is bonded in a distorted single-bond geometry to two equivalent K(1) and one S(2) atom. In the third O site, O(7) is bonded in a distorted single-bond geometry to one K(1), two equivalent Sm(1), and one S(1) atom. In the fourth O site, O(8) is bonded in a 1-coordinate geometry to one K(1), one Sm(1), and one S(2) atom. In the fifth O site, O(1) is bonded in a 1-coordinate geometry to one K(1), one Sm(1), and one S(1) atom. In the sixth O site, O(2) is bonded in a distorted single-bond geometry to two equivalent Sm(1) and one S(1) atom. In the seventh O site, O(3) is bonded in a distorted single-bond geometry to three equivalent K(1) and one S(1) atom. In the eighth O site, O(4) is bonded in a distorted single-bond geometry to one K(1), one Sm(1), and one S(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_KSm(SO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.247
_cell_length_b   8.736
_cell_length_c   10.657
_cell_angle_alpha   87.801
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   674.220
_cell_formula_units_Z   4
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  0.350  0.437  0.842  1.0
  K  K1  1  0.650  0.563  0.158  1.0
  K  K2  1  0.850  0.563  0.658  1.0
  K  K3  1  0.150  0.437  0.342  1.0
  Sm  Sm4  1  0.169  0.944  0.849  1.0
  Sm  Sm5  1  0.831  0.056  0.151  1.0
  Sm  Sm6  1  0.669  0.056  0.651  1.0
  Sm  Sm7  1  0.331  0.944  0.349  1.0
  S  S8  1  0.166  0.181  0.610  1.0
  S  S9  1  0.834  0.819  0.390  1.0
  S  S10  1  0.666  0.819  0.890  1.0
  S  S11  1  0.334  0.181  0.110  1.0
  S  S12  1  0.343  0.729  0.589  1.0
  S  S13  1  0.657  0.271  0.411  1.0
  S  S14  1  0.843  0.271  0.911  1.0
  S  S15  1  0.157  0.729  0.089  1.0
  O  O16  1  0.818  0.874  0.519  1.0
  O  O17  1  0.182  0.126  0.481  1.0
  O  O18  1  0.318  0.126  0.981  1.0
  O  O19  1  0.682  0.874  0.019  1.0
  O  O20  1  0.511  0.906  0.824  1.0
  O  O21  1  0.489  0.094  0.176  1.0
  O  O22  1  0.011  0.094  0.676  1.0
  O  O23  1  0.989  0.906  0.324  1.0
  O  O24  1  0.140  0.346  0.608  1.0
  O  O25  1  0.860  0.654  0.392  1.0
  O  O26  1  0.640  0.654  0.892  1.0
  O  O27  1  0.360  0.346  0.108  1.0
  O  O28  1  0.247  0.703  0.965  1.0
  O  O29  1  0.753  0.297  0.035  1.0
  O  O30  1  0.747  0.297  0.535  1.0
  O  O31  1  0.253  0.703  0.465  1.0
  O  O32  1  0.445  0.879  0.561  1.0
  O  O33  1  0.555  0.121  0.439  1.0
  O  O34  1  0.945  0.121  0.939  1.0
  O  O35  1  0.055  0.879  0.061  1.0
  O  O36  1  0.469  0.607  0.629  1.0
  O  O37  1  0.531  0.393  0.371  1.0
  O  O38  1  0.969  0.393  0.871  1.0
  O  O39  1  0.031  0.607  0.129  1.0
  O  O40  1  0.833  0.864  0.809  1.0
  O  O41  1  0.167  0.136  0.191  1.0
  O  O42  1  0.333  0.136  0.691  1.0
  O  O43  1  0.667  0.864  0.309  1.0
  O  O44  1  0.200  0.756  0.687  1.0
  O  O45  1  0.800  0.244  0.313  1.0
  O  O46  1  0.700  0.244  0.813  1.0
  O  O47  1  0.300  0.756  0.187  1.0
[/CIF]
.
The compound described by KSm(SO4)2 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 9-coordinate geometry to one O(1), one O(4), one O(7), one O(8), two equivalent O(6), and three equivalent O(3) atoms. Sm(1) is bonded in a 9-coordinate geometry to one O(1), one O(4), one O(8), two equivalent O(2), two equivalent O(5), and two equivalent O(7) atoms. There are two inequivalent S sites. In the first S site, S(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(7) atom. In the second S site, S(2) is bonded in a tetrahedral geometry to one O(4), one O(5), one O(6), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(5) is bonded in a distorted single-bond geometry to two equivalent Sm(1) and one S(2) atom. In the second O site, O(6) is bonded in a distorted single-bond geometry to two equivalent K(1) and one S(2) atom. In the third O site, O(7) is bonded in a distorted single-bond geometry to one K(1), two equivalent Sm(1), and one S(1) atom. In the fourth O site, O(8) is bonded in a 1-coordinate geometry to one K(1), one Sm(1), and one S(2) atom. In the fifth O site, O(1) is bonded in a 1-coordinate geometry to one K(1), one Sm(1), and one S(1) atom. In the sixth O site, O(2) is bonded in a distorted single-bond geometry to two equivalent Sm(1) and one S(1) atom. In the seventh O site, O(3) is bonded in a distorted single-bond geometry to three equivalent K(1) and one S(1) atom. In the eighth O site, O(4) is bonded in a distorted single-bond geometry to one K(1), one Sm(1), and one S(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_KSm(SO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.247
_cell_length_b   8.736
_cell_length_c   10.657
_cell_angle_alpha   87.801
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   674.220
_cell_formula_units_Z   4
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  0.350  0.437  0.842  1.0
  K  K1  1  0.650  0.563  0.158  1.0
  K  K2  1  0.850  0.563  0.658  1.0
  K  K3  1  0.150  0.437  0.342  1.0
  Sm  Sm4  1  0.169  0.944  0.849  1.0
  Sm  Sm5  1  0.831  0.056  0.151  1.0
  Sm  Sm6  1  0.669  0.056  0.651  1.0
  Sm  Sm7  1  0.331  0.944  0.349  1.0
  S  S8  1  0.166  0.181  0.610  1.0
  S  S9  1  0.834  0.819  0.390  1.0
  S  S10  1  0.666  0.819  0.890  1.0
  S  S11  1  0.334  0.181  0.110  1.0
  S  S12  1  0.343  0.729  0.589  1.0
  S  S13  1  0.657  0.271  0.411  1.0
  S  S14  1  0.843  0.271  0.911  1.0
  S  S15  1  0.157  0.729  0.089  1.0
  O  O16  1  0.818  0.874  0.519  1.0
  O  O17  1  0.182  0.126  0.481  1.0
  O  O18  1  0.318  0.126  0.981  1.0
  O  O19  1  0.682  0.874  0.019  1.0
  O  O20  1  0.511  0.906  0.824  1.0
  O  O21  1  0.489  0.094  0.176  1.0
  O  O22  1  0.011  0.094  0.676  1.0
  O  O23  1  0.989  0.906  0.324  1.0
  O  O24  1  0.140  0.346  0.608  1.0
  O  O25  1  0.860  0.654  0.392  1.0
  O  O26  1  0.640  0.654  0.892  1.0
  O  O27  1  0.360  0.346  0.108  1.0
  O  O28  1  0.247  0.703  0.965  1.0
  O  O29  1  0.753  0.297  0.035  1.0
  O  O30  1  0.747  0.297  0.535  1.0
  O  O31  1  0.253  0.703  0.465  1.0
  O  O32  1  0.445  0.879  0.561  1.0
  O  O33  1  0.555  0.121  0.439  1.0
  O  O34  1  0.945  0.121  0.939  1.0
  O  O35  1  0.055  0.879  0.061  1.0
  O  O36  1  0.469  0.607  0.629  1.0
  O  O37  1  0.531  0.393  0.371  1.0
  O  O38  1  0.969  0.393  0.871  1.0
  O  O39  1  0.031  0.607  0.129  1.0
  O  O40  1  0.833  0.864  0.809  1.0
  O  O41  1  0.167  0.136  0.191  1.0
  O  O42  1  0.333  0.136  0.691  1.0
  O  O43  1  0.667  0.864  0.309  1.0
  O  O44  1  0.200  0.756  0.687  1.0
  O  O45  1  0.800  0.244  0.313  1.0
  O  O46  1  0.700  0.244  0.813  1.0
  O  O47  1  0.300  0.756  0.187  1.0
[/CIF]
.