The compound described by K2TaF7 crystallizes in the orthorhombic Pnma space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a distorted q6 geometry to two equivalent F(1), two equivalent F(3), three equivalent F(4), and four equivalent F(2) atoms. In the second K site, K(2) is bonded in a 10-coordinate geometry to two equivalent F(2), four equivalent F(1), and four equivalent F(3) atoms. Ta(1) is bonded in a distorted pentagonal bipyramidal geometry to one F(4), two equivalent F(1), two equivalent F(2), and two equivalent F(3) atoms. There are four inequivalent F sites. In the first F site, F(4) is bonded in a distorted single-bond geometry to three equivalent K(1) and one Ta(1) atom. In the second F site, F(1) is bonded in a distorted single-bond geometry to one K(1), two equivalent K(2), and one Ta(1) atom. In the third F site, F(2) is bonded in a 4-coordinate geometry to one K(2), two equivalent K(1), and one Ta(1) atom. In the fourth F site, F(3) is bonded in a 1-coordinate geometry to one K(1), two equivalent K(2), and one Ta(1) atom. is represented by the CIF card [CIF]
data_K2TaF7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.723
_cell_length_b   9.603
_cell_length_c   11.509
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   632.469
_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  0.750  0.130  0.046  1.0
  K  K1  1  0.750  0.630  0.454  1.0
  K  K2  1  0.250  0.870  0.954  1.0
  K  K3  1  0.250  0.370  0.546  1.0
  K  K4  1  0.250  0.451  0.165  1.0
  K  K5  1  0.250  0.951  0.335  1.0
  K  K6  1  0.750  0.549  0.835  1.0
  K  K7  1  0.750  0.049  0.665  1.0
  Ta  Ta8  1  0.250  0.242  0.870  1.0
  Ta  Ta9  1  0.250  0.742  0.630  1.0
  Ta  Ta10  1  0.750  0.758  0.130  1.0
  Ta  Ta11  1  0.750  0.258  0.370  1.0
  F  F12  1  0.027  0.360  0.955  1.0
  F  F13  1  0.473  0.860  0.545  1.0
  F  F14  1  0.527  0.640  0.045  1.0
  F  F15  1  0.973  0.140  0.455  1.0
  F  F16  1  0.973  0.640  0.045  1.0
  F  F17  1  0.527  0.140  0.455  1.0
  F  F18  1  0.473  0.360  0.955  1.0
  F  F19  1  0.027  0.860  0.545  1.0
  F  F20  1  0.028  0.088  0.851  1.0
  F  F21  1  0.472  0.588  0.649  1.0
  F  F22  1  0.528  0.912  0.149  1.0
  F  F23  1  0.972  0.412  0.351  1.0
  F  F24  1  0.972  0.912  0.149  1.0
  F  F25  1  0.528  0.412  0.351  1.0
  F  F26  1  0.472  0.088  0.851  1.0
  F  F27  1  0.028  0.588  0.649  1.0
  F  F28  1  0.041  0.306  0.747  1.0
  F  F29  1  0.459  0.806  0.753  1.0
  F  F30  1  0.541  0.694  0.253  1.0
  F  F31  1  0.959  0.194  0.247  1.0
  F  F32  1  0.959  0.694  0.253  1.0
  F  F33  1  0.541  0.194  0.247  1.0
  F  F34  1  0.459  0.306  0.747  1.0
  F  F35  1  0.041  0.806  0.753  1.0
  F  F36  1  0.250  0.155  0.027  1.0
  F  F37  1  0.250  0.655  0.473  1.0
  F  F38  1  0.750  0.845  0.973  1.0
  F  F39  1  0.750  0.345  0.527  1.0
[/CIF]
.
The compound described by K2TaF7 crystallizes in the orthorhombic Pnma space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a distorted q6 geometry to two equivalent F(1), two equivalent F(3), three equivalent F(4), and four equivalent F(2) atoms. In the second K site, K(2) is bonded in a 10-coordinate geometry to two equivalent F(2), four equivalent F(1), and four equivalent F(3) atoms. Ta(1) is bonded in a distorted pentagonal bipyramidal geometry to one F(4), two equivalent F(1), two equivalent F(2), and two equivalent F(3) atoms. There are four inequivalent F sites. In the first F site, F(4) is bonded in a distorted single-bond geometry to three equivalent K(1) and one Ta(1) atom. In the second F site, F(1) is bonded in a distorted single-bond geometry to one K(1), two equivalent K(2), and one Ta(1) atom. In the third F site, F(2) is bonded in a 4-coordinate geometry to one K(2), two equivalent K(1), and one Ta(1) atom. In the fourth F site, F(3) is bonded in a 1-coordinate geometry to one K(1), two equivalent K(2), and one Ta(1) atom. is represented by the CIF card [CIF]
data_K2TaF7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.723
_cell_length_b   9.603
_cell_length_c   11.509
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   632.469
_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  0.750  0.130  0.046  1.0
  K  K1  1  0.750  0.630  0.454  1.0
  K  K2  1  0.250  0.870  0.954  1.0
  K  K3  1  0.250  0.370  0.546  1.0
  K  K4  1  0.250  0.451  0.165  1.0
  K  K5  1  0.250  0.951  0.335  1.0
  K  K6  1  0.750  0.549  0.835  1.0
  K  K7  1  0.750  0.049  0.665  1.0
  Ta  Ta8  1  0.250  0.242  0.870  1.0
  Ta  Ta9  1  0.250  0.742  0.630  1.0
  Ta  Ta10  1  0.750  0.758  0.130  1.0
  Ta  Ta11  1  0.750  0.258  0.370  1.0
  F  F12  1  0.027  0.360  0.955  1.0
  F  F13  1  0.473  0.860  0.545  1.0
  F  F14  1  0.527  0.640  0.045  1.0
  F  F15  1  0.973  0.140  0.455  1.0
  F  F16  1  0.973  0.640  0.045  1.0
  F  F17  1  0.527  0.140  0.455  1.0
  F  F18  1  0.473  0.360  0.955  1.0
  F  F19  1  0.027  0.860  0.545  1.0
  F  F20  1  0.028  0.088  0.851  1.0
  F  F21  1  0.472  0.588  0.649  1.0
  F  F22  1  0.528  0.912  0.149  1.0
  F  F23  1  0.972  0.412  0.351  1.0
  F  F24  1  0.972  0.912  0.149  1.0
  F  F25  1  0.528  0.412  0.351  1.0
  F  F26  1  0.472  0.088  0.851  1.0
  F  F27  1  0.028  0.588  0.649  1.0
  F  F28  1  0.041  0.306  0.747  1.0
  F  F29  1  0.459  0.806  0.753  1.0
  F  F30  1  0.541  0.694  0.253  1.0
  F  F31  1  0.959  0.194  0.247  1.0
  F  F32  1  0.959  0.694  0.253  1.0
  F  F33  1  0.541  0.194  0.247  1.0
  F  F34  1  0.459  0.306  0.747  1.0
  F  F35  1  0.041  0.806  0.753  1.0
  F  F36  1  0.250  0.155  0.027  1.0
  F  F37  1  0.250  0.655  0.473  1.0
  F  F38  1  0.750  0.845  0.973  1.0
  F  F39  1  0.750  0.345  0.527  1.0
[/CIF]
.