The structure described by KYP2O7 crystallizes in the orthorhombic Cmcm space group. K(1) is bonded in a 10-coordinate geometry to two equivalent O(3) and eight equivalent O(1) atoms. Y(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form YO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra. P(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form PO4 tetrahedra that share corners with three equivalent Y(1)O6 octahedra and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 23-43°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to two equivalent K(1), one Y(1), and one P(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Y(1) and one P(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to two equivalent K(1) and two equivalent P(1) atoms. is represented by the CIF file [CIF]
data_KYP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.413
_cell_length_b   5.413
_cell_length_c   12.137
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   116.132
_symmetry_Int_Tables_number   1
_cell_volume   319.322
_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  0.696  0.304  0.250  1.0
  K  K1  1  0.304  0.696  0.750  1.0
  Y  Y2  1  0.000  0.000  0.000  1.0
  Y  Y3  1  0.000  0.000  0.500  1.0
  P  P4  1  0.357  0.643  0.371  1.0
  P  P5  1  0.643  0.357  0.629  1.0
  P  P6  1  0.357  0.643  0.129  1.0
  P  P7  1  0.643  0.357  0.871  1.0
  O  O8  1  0.332  0.229  0.624  1.0
  O  O9  1  0.770  0.230  0.551  1.0
  O  O10  1  0.668  0.771  0.376  1.0
  O  O11  1  0.668  0.771  0.124  1.0
  O  O12  1  0.230  0.770  0.449  1.0
  O  O13  1  0.771  0.668  0.876  1.0
  O  O14  1  0.230  0.770  0.051  1.0
  O  O15  1  0.770  0.230  0.949  1.0
  O  O16  1  0.771  0.668  0.624  1.0
  O  O17  1  0.720  0.280  0.750  1.0
  O  O18  1  0.229  0.332  0.376  1.0
  O  O19  1  0.229  0.332  0.124  1.0
  O  O20  1  0.280  0.720  0.250  1.0
  O  O21  1  0.332  0.229  0.876  1.0
[/CIF]
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The structure described by KYP2O7 crystallizes in the orthorhombic Cmcm space group. K(1) is bonded in a 10-coordinate geometry to two equivalent O(3) and eight equivalent O(1) atoms. Y(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form YO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra. P(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form PO4 tetrahedra that share corners with three equivalent Y(1)O6 octahedra and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 23-43°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to two equivalent K(1), one Y(1), and one P(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Y(1) and one P(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to two equivalent K(1) and two equivalent P(1) atoms. is represented by the CIF file [CIF]
data_KYP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.413
_cell_length_b   5.413
_cell_length_c   12.137
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   116.132
_symmetry_Int_Tables_number   1
_cell_volume   319.322
_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  0.696  0.304  0.250  1.0
  K  K1  1  0.304  0.696  0.750  1.0
  Y  Y2  1  0.000  0.000  0.000  1.0
  Y  Y3  1  0.000  0.000  0.500  1.0
  P  P4  1  0.357  0.643  0.371  1.0
  P  P5  1  0.643  0.357  0.629  1.0
  P  P6  1  0.357  0.643  0.129  1.0
  P  P7  1  0.643  0.357  0.871  1.0
  O  O8  1  0.332  0.229  0.624  1.0
  O  O9  1  0.770  0.230  0.551  1.0
  O  O10  1  0.668  0.771  0.376  1.0
  O  O11  1  0.668  0.771  0.124  1.0
  O  O12  1  0.230  0.770  0.449  1.0
  O  O13  1  0.771  0.668  0.876  1.0
  O  O14  1  0.230  0.770  0.051  1.0
  O  O15  1  0.770  0.230  0.949  1.0
  O  O16  1  0.771  0.668  0.624  1.0
  O  O17  1  0.720  0.280  0.750  1.0
  O  O18  1  0.229  0.332  0.376  1.0
  O  O19  1  0.229  0.332  0.124  1.0
  O  O20  1  0.280  0.720  0.250  1.0
  O  O21  1  0.332  0.229  0.876  1.0
[/CIF]
.