The structure described by KSm(PO3)4 crystallizes in the monoclinic C2/c space group. K(1) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms. Sm(1) is bonded in a 8-coordinate geometry to two equivalent O(3), two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(5), and one O(6) atom to form corner-sharing PO4 tetrahedra. In the second P site, P(2) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form corner-sharing PO4 tetrahedra. There are six inequivalent O sites. In the first O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Sm(1) and one P(2) atom. In the second O site, O(4) is bonded in a 3-coordinate geometry to one K(1), one Sm(1), and one P(2) atom. In the third O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Sm(1) and one P(1) atom. In the fourth O site, O(6) is bonded in a distorted single-bond geometry to one K(1), one Sm(1), and one P(1) atom. In the fifth O site, O(1) is bonded in a distorted bent 120 degrees geometry to one P(1) and one P(2) atom. In the sixth O site, O(2) is bonded in a distorted bent 150 degrees geometry to one K(1), one P(1), and one P(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_KSm(PO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.531
_cell_length_b   7.531
_cell_length_c   10.709
_cell_angle_alpha   79.041
_cell_angle_beta   79.041
_cell_angle_gamma   115.515
_symmetry_Int_Tables_number   1
_cell_volume   512.093
_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  0.311  0.689  0.250  1.0
  K  K1  1  0.689  0.311  0.750  1.0
  Sm  Sm2  1  0.621  0.379  0.250  1.0
  Sm  Sm3  1  0.379  0.621  0.750  1.0
  P  P4  1  0.122  0.787  0.996  1.0
  P  P5  1  0.213  0.878  0.504  1.0
  P  P6  1  0.878  0.213  0.004  1.0
  P  P7  1  0.787  0.122  0.496  1.0
  P  P8  1  0.752  0.805  0.950  1.0
  P  P9  1  0.195  0.248  0.550  1.0
  P  P10  1  0.248  0.195  0.050  1.0
  P  P11  1  0.805  0.752  0.450  1.0
  O  O12  1  0.991  0.854  0.914  1.0
  O  O13  1  0.146  0.009  0.586  1.0
  O  O14  1  0.009  0.146  0.086  1.0
  O  O15  1  0.854  0.991  0.414  1.0
  O  O16  1  0.777  0.032  0.937  1.0
  O  O17  1  0.968  0.223  0.563  1.0
  O  O18  1  0.223  0.968  0.063  1.0
  O  O19  1  0.032  0.777  0.437  1.0
  O  O20  1  0.673  0.743  0.839  1.0
  O  O21  1  0.257  0.327  0.661  1.0
  O  O22  1  0.327  0.257  0.161  1.0
  O  O23  1  0.743  0.673  0.339  1.0
  O  O24  1  0.669  0.638  0.592  1.0
  O  O25  1  0.362  0.331  0.908  1.0
  O  O26  1  0.331  0.362  0.408  1.0
  O  O27  1  0.638  0.669  0.092  1.0
  O  O28  1  0.801  0.300  0.395  1.0
  O  O29  1  0.700  0.199  0.105  1.0
  O  O30  1  0.199  0.700  0.605  1.0
  O  O31  1  0.300  0.801  0.895  1.0
  O  O32  1  0.594  0.988  0.612  1.0
  O  O33  1  0.012  0.406  0.888  1.0
  O  O34  1  0.406  0.012  0.388  1.0
  O  O35  1  0.988  0.594  0.112  1.0
[/CIF]
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The structure described by KSm(PO3)4 crystallizes in the monoclinic C2/c space group. K(1) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms. Sm(1) is bonded in a 8-coordinate geometry to two equivalent O(3), two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(5), and one O(6) atom to form corner-sharing PO4 tetrahedra. In the second P site, P(2) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form corner-sharing PO4 tetrahedra. There are six inequivalent O sites. In the first O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Sm(1) and one P(2) atom. In the second O site, O(4) is bonded in a 3-coordinate geometry to one K(1), one Sm(1), and one P(2) atom. In the third O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Sm(1) and one P(1) atom. In the fourth O site, O(6) is bonded in a distorted single-bond geometry to one K(1), one Sm(1), and one P(1) atom. In the fifth O site, O(1) is bonded in a distorted bent 120 degrees geometry to one P(1) and one P(2) atom. In the sixth O site, O(2) is bonded in a distorted bent 150 degrees geometry to one K(1), one P(1), and one P(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_KSm(PO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.531
_cell_length_b   7.531
_cell_length_c   10.709
_cell_angle_alpha   79.041
_cell_angle_beta   79.041
_cell_angle_gamma   115.515
_symmetry_Int_Tables_number   1
_cell_volume   512.093
_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  0.311  0.689  0.250  1.0
  K  K1  1  0.689  0.311  0.750  1.0
  Sm  Sm2  1  0.621  0.379  0.250  1.0
  Sm  Sm3  1  0.379  0.621  0.750  1.0
  P  P4  1  0.122  0.787  0.996  1.0
  P  P5  1  0.213  0.878  0.504  1.0
  P  P6  1  0.878  0.213  0.004  1.0
  P  P7  1  0.787  0.122  0.496  1.0
  P  P8  1  0.752  0.805  0.950  1.0
  P  P9  1  0.195  0.248  0.550  1.0
  P  P10  1  0.248  0.195  0.050  1.0
  P  P11  1  0.805  0.752  0.450  1.0
  O  O12  1  0.991  0.854  0.914  1.0
  O  O13  1  0.146  0.009  0.586  1.0
  O  O14  1  0.009  0.146  0.086  1.0
  O  O15  1  0.854  0.991  0.414  1.0
  O  O16  1  0.777  0.032  0.937  1.0
  O  O17  1  0.968  0.223  0.563  1.0
  O  O18  1  0.223  0.968  0.063  1.0
  O  O19  1  0.032  0.777  0.437  1.0
  O  O20  1  0.673  0.743  0.839  1.0
  O  O21  1  0.257  0.327  0.661  1.0
  O  O22  1  0.327  0.257  0.161  1.0
  O  O23  1  0.743  0.673  0.339  1.0
  O  O24  1  0.669  0.638  0.592  1.0
  O  O25  1  0.362  0.331  0.908  1.0
  O  O26  1  0.331  0.362  0.408  1.0
  O  O27  1  0.638  0.669  0.092  1.0
  O  O28  1  0.801  0.300  0.395  1.0
  O  O29  1  0.700  0.199  0.105  1.0
  O  O30  1  0.199  0.700  0.605  1.0
  O  O31  1  0.300  0.801  0.895  1.0
  O  O32  1  0.594  0.988  0.612  1.0
  O  O33  1  0.012  0.406  0.888  1.0
  O  O34  1  0.406  0.012  0.388  1.0
  O  O35  1  0.988  0.594  0.112  1.0
[/CIF]
.