The structure described by KU3AsO15 crystallizes in the orthorhombic Cccm space group. K(1) is bonded to two equivalent O(3), two equivalent O(5), and four equivalent O(2) atoms to form distorted KO8 octahedra that share corners with two equivalent K(1)O8 octahedra and corners with four equivalent U(1)O7 pentagonal bipyramids. The corner-sharing octahedra are not tilted. There are two inequivalent U sites. In the first U site, U(1) is bonded to one O(6), two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form distorted UO7 pentagonal bipyramids that share corners with two equivalent K(1)O8 octahedra, corners with two equivalent As(1)O4 tetrahedra, and  an edgeedge with one U(1)O7 pentagonal bipyramid. The corner-sharing octahedral tilt angles are 54°. In the second U site, U(2) is bonded in a distorted linear geometry to two equivalent O(1), two equivalent O(5), and four equivalent O(4) atoms. As(1) is bonded to four equivalent O(4) atoms to form AsO4 tetrahedra that share corners with four equivalent U(1)O7 pentagonal bipyramids. There are six inequivalent O sites. In the first O site, O(3) is bonded in a linear geometry to two equivalent K(1) atoms. In the second O site, O(4) is bonded in a 3-coordinate geometry to one U(1), one U(2), and one As(1) atom. In the third O site, O(5) is bonded in a distorted single-bond geometry to one K(1) and one U(2) atom. In the fourth O site, O(6) is bonded in a single-bond geometry to one U(1) atom. In the fifth O site, O(1) is bonded in a trigonal planar geometry to one U(2) and two equivalent U(1) atoms. In the sixth O site, O(2) is bonded in a distorted bent 120 degrees geometry to one K(1) and one U(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_KU3AsO15
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.318
_cell_length_b   7.318
_cell_length_c   13.386
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   108.672
_symmetry_Int_Tables_number   1
_cell_volume   679.056
_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  0.000  0.000  0.000  1.0
  K  K1  1  0.000  0.000  0.500  1.0
  U  U2  1  0.500  0.000  0.860  1.0
  U  U3  1  0.000  0.500  0.640  1.0
  U  U4  1  0.500  0.000  0.140  1.0
  U  U5  1  0.000  0.500  0.360  1.0
  U  U6  1  0.500  0.500  0.000  1.0
  U  U7  1  0.500  0.500  0.500  1.0
  As  As8  1  0.500  0.500  0.750  1.0
  As  As9  1  0.500  0.500  0.250  1.0
  O  O10  1  0.489  0.161  0.000  1.0
  O  O11  1  0.511  0.839  0.000  1.0
  O  O12  1  0.839  0.511  0.500  1.0
  O  O13  1  0.161  0.489  0.500  1.0
  O  O14  1  0.100  0.769  0.634  1.0
  O  O15  1  0.900  0.231  0.634  1.0
  O  O16  1  0.231  0.900  0.866  1.0
  O  O17  1  0.769  0.100  0.866  1.0
  O  O18  1  0.900  0.231  0.366  1.0
  O  O19  1  0.100  0.769  0.366  1.0
  O  O20  1  0.769  0.100  0.134  1.0
  O  O21  1  0.231  0.900  0.134  1.0
  O  O22  1  0.000  0.000  0.750  1.0
  O  O23  1  0.000  0.000  0.250  1.0
  O  O24  1  0.471  0.319  0.836  1.0
  O  O25  1  0.529  0.681  0.836  1.0
  O  O26  1  0.681  0.529  0.664  1.0
  O  O27  1  0.319  0.471  0.664  1.0
  O  O28  1  0.529  0.681  0.164  1.0
  O  O29  1  0.471  0.319  0.164  1.0
  O  O30  1  0.319  0.471  0.336  1.0
  O  O31  1  0.681  0.529  0.336  1.0
  O  O32  1  0.759  0.579  0.000  1.0
  O  O33  1  0.241  0.421  0.000  1.0
  O  O34  1  0.421  0.241  0.500  1.0
  O  O35  1  0.579  0.759  0.500  1.0
  O  O36  1  0.000  0.500  0.780  1.0
  O  O37  1  0.500  0.000  0.720  1.0
  O  O38  1  0.000  0.500  0.220  1.0
  O  O39  1  0.500  0.000  0.280  1.0
[/CIF]
.
The structure described by KU3AsO15 crystallizes in the orthorhombic Cccm space group. K(1) is bonded to two equivalent O(3), two equivalent O(5), and four equivalent O(2) atoms to form distorted KO8 octahedra that share corners with two equivalent K(1)O8 octahedra and corners with four equivalent U(1)O7 pentagonal bipyramids. The corner-sharing octahedra are not tilted. There are two inequivalent U sites. In the first U site, U(1) is bonded to one O(6), two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form distorted UO7 pentagonal bipyramids that share corners with two equivalent K(1)O8 octahedra, corners with two equivalent As(1)O4 tetrahedra, and  an edgeedge with one U(1)O7 pentagonal bipyramid. The corner-sharing octahedral tilt angles are 54°. In the second U site, U(2) is bonded in a distorted linear geometry to two equivalent O(1), two equivalent O(5), and four equivalent O(4) atoms. As(1) is bonded to four equivalent O(4) atoms to form AsO4 tetrahedra that share corners with four equivalent U(1)O7 pentagonal bipyramids. There are six inequivalent O sites. In the first O site, O(3) is bonded in a linear geometry to two equivalent K(1) atoms. In the second O site, O(4) is bonded in a 3-coordinate geometry to one U(1), one U(2), and one As(1) atom. In the third O site, O(5) is bonded in a distorted single-bond geometry to one K(1) and one U(2) atom. In the fourth O site, O(6) is bonded in a single-bond geometry to one U(1) atom. In the fifth O site, O(1) is bonded in a trigonal planar geometry to one U(2) and two equivalent U(1) atoms. In the sixth O site, O(2) is bonded in a distorted bent 120 degrees geometry to one K(1) and one U(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_KU3AsO15
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.318
_cell_length_b   7.318
_cell_length_c   13.386
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   108.672
_symmetry_Int_Tables_number   1
_cell_volume   679.056
_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  0.000  0.000  0.000  1.0
  K  K1  1  0.000  0.000  0.500  1.0
  U  U2  1  0.500  0.000  0.860  1.0
  U  U3  1  0.000  0.500  0.640  1.0
  U  U4  1  0.500  0.000  0.140  1.0
  U  U5  1  0.000  0.500  0.360  1.0
  U  U6  1  0.500  0.500  0.000  1.0
  U  U7  1  0.500  0.500  0.500  1.0
  As  As8  1  0.500  0.500  0.750  1.0
  As  As9  1  0.500  0.500  0.250  1.0
  O  O10  1  0.489  0.161  0.000  1.0
  O  O11  1  0.511  0.839  0.000  1.0
  O  O12  1  0.839  0.511  0.500  1.0
  O  O13  1  0.161  0.489  0.500  1.0
  O  O14  1  0.100  0.769  0.634  1.0
  O  O15  1  0.900  0.231  0.634  1.0
  O  O16  1  0.231  0.900  0.866  1.0
  O  O17  1  0.769  0.100  0.866  1.0
  O  O18  1  0.900  0.231  0.366  1.0
  O  O19  1  0.100  0.769  0.366  1.0
  O  O20  1  0.769  0.100  0.134  1.0
  O  O21  1  0.231  0.900  0.134  1.0
  O  O22  1  0.000  0.000  0.750  1.0
  O  O23  1  0.000  0.000  0.250  1.0
  O  O24  1  0.471  0.319  0.836  1.0
  O  O25  1  0.529  0.681  0.836  1.0
  O  O26  1  0.681  0.529  0.664  1.0
  O  O27  1  0.319  0.471  0.664  1.0
  O  O28  1  0.529  0.681  0.164  1.0
  O  O29  1  0.471  0.319  0.164  1.0
  O  O30  1  0.319  0.471  0.336  1.0
  O  O31  1  0.681  0.529  0.336  1.0
  O  O32  1  0.759  0.579  0.000  1.0
  O  O33  1  0.241  0.421  0.000  1.0
  O  O34  1  0.421  0.241  0.500  1.0
  O  O35  1  0.579  0.759  0.500  1.0
  O  O36  1  0.000  0.500  0.780  1.0
  O  O37  1  0.500  0.000  0.720  1.0
  O  O38  1  0.000  0.500  0.220  1.0
  O  O39  1  0.500  0.000  0.280  1.0
[/CIF]
.