The crystal structure described by K3TmV2O8 crystallizes in the trigonal P-3m1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 7-coordinate geometry to one O(1) and six equivalent O(2) atoms. In the second K site, K(2) is bonded in a distorted hexagonal planar geometry to six equivalent O(2) atoms. Tm(1) is bonded to six equivalent O(2) atoms to form TmO6 octahedra that share corners with six equivalent V(1)O4 tetrahedra. V(1) is bonded to one O(1) and three equivalent O(2) atoms to form VO4 tetrahedra that share corners with three equivalent Tm(1)O6 octahedra. The corner-sharing octahedral tilt angles are 16°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one K(1) and one V(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one K(2), two equivalent K(1), one Tm(1), and one V(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K3TmV2O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.970
_cell_length_b   5.971
_cell_length_c   7.746
_cell_angle_alpha   90.000
_cell_angle_beta   90.002
_cell_angle_gamma   120.001
_symmetry_Int_Tables_number   1
_cell_volume   239.116
_cell_formula_units_Z   1
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  0.667  0.333  0.702  1.0
  K  K1  1  0.333  0.667  0.298  1.0
  K  K2  1  0.000  0.000  0.000  1.0
  Tm  Tm3  1  0.000  0.000  0.500  1.0
  V  V4  1  0.667  0.333  0.252  1.0
  V  V5  1  0.333  0.667  0.748  1.0
  O  O6  1  0.667  0.333  0.035  1.0
  O  O7  1  0.333  0.667  0.965  1.0
  O  O8  1  0.654  0.827  0.670  1.0
  O  O9  1  0.173  0.827  0.670  1.0
  O  O10  1  0.173  0.346  0.670  1.0
  O  O11  1  0.346  0.173  0.330  1.0
  O  O12  1  0.827  0.173  0.330  1.0
  O  O13  1  0.827  0.654  0.330  1.0
[/CIF]
.
The crystal structure described by K3TmV2O8 crystallizes in the trigonal P-3m1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 7-coordinate geometry to one O(1) and six equivalent O(2) atoms. In the second K site, K(2) is bonded in a distorted hexagonal planar geometry to six equivalent O(2) atoms. Tm(1) is bonded to six equivalent O(2) atoms to form TmO6 octahedra that share corners with six equivalent V(1)O4 tetrahedra. V(1) is bonded to one O(1) and three equivalent O(2) atoms to form VO4 tetrahedra that share corners with three equivalent Tm(1)O6 octahedra. The corner-sharing octahedral tilt angles are 16°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one K(1) and one V(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one K(2), two equivalent K(1), one Tm(1), and one V(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K3TmV2O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.970
_cell_length_b   5.971
_cell_length_c   7.746
_cell_angle_alpha   90.000
_cell_angle_beta   90.002
_cell_angle_gamma   120.001
_symmetry_Int_Tables_number   1
_cell_volume   239.116
_cell_formula_units_Z   1
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  0.667  0.333  0.702  1.0
  K  K1  1  0.333  0.667  0.298  1.0
  K  K2  1  0.000  0.000  0.000  1.0
  Tm  Tm3  1  0.000  0.000  0.500  1.0
  V  V4  1  0.667  0.333  0.252  1.0
  V  V5  1  0.333  0.667  0.748  1.0
  O  O6  1  0.667  0.333  0.035  1.0
  O  O7  1  0.333  0.667  0.965  1.0
  O  O8  1  0.654  0.827  0.670  1.0
  O  O9  1  0.173  0.827  0.670  1.0
  O  O10  1  0.173  0.346  0.670  1.0
  O  O11  1  0.346  0.173  0.330  1.0
  O  O12  1  0.827  0.173  0.330  1.0
  O  O13  1  0.827  0.654  0.330  1.0
[/CIF]
.