The compound described by TaAsO5 crystallizes in the orthorhombic P2_12_12_1 space group. Ta(1) is bonded to one O(4), one O(5), two equivalent O(1), and two equivalent O(2) atoms to form TaO6 octahedra that share corners with four equivalent As(1)O4 tetrahedra and edges with two equivalent Ta(1)O6 octahedra. As(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form AsO4 tetrahedra that share corners with four equivalent Ta(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-55°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to two equivalent Ta(1) atoms. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Ta(1) and one As(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to one As(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Ta(1) and one As(1) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Ta(1) and one As(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_TaAsO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.303
_cell_length_b   7.741
_cell_length_c   8.379
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   408.811
_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
  Ta  Ta0  1  0.249  0.753  0.996  1.0
  Ta  Ta1  1  0.251  0.247  0.496  1.0
  Ta  Ta2  1  0.751  0.253  0.504  1.0
  Ta  Ta3  1  0.749  0.747  0.004  1.0
  As  As4  1  0.486  0.135  0.836  1.0
  As  As5  1  0.014  0.865  0.336  1.0
  As  As6  1  0.514  0.635  0.664  1.0
  As  As7  1  0.986  0.365  0.164  1.0
  O  O8  1  0.992  0.864  0.917  1.0
  O  O9  1  0.508  0.136  0.417  1.0
  O  O10  1  0.008  0.364  0.583  1.0
  O  O11  1  0.492  0.636  0.083  1.0
  O  O12  1  0.505  0.919  0.928  1.0
  O  O13  1  0.995  0.081  0.428  1.0
  O  O14  1  0.495  0.419  0.572  1.0
  O  O15  1  0.005  0.581  0.072  1.0
  O  O16  1  0.451  0.289  0.967  1.0
  O  O17  1  0.049  0.711  0.467  1.0
  O  O18  1  0.549  0.789  0.533  1.0
  O  O19  1  0.951  0.211  0.033  1.0
  O  O20  1  0.712  0.145  0.716  1.0
  O  O21  1  0.788  0.855  0.216  1.0
  O  O22  1  0.288  0.645  0.784  1.0
  O  O23  1  0.212  0.355  0.284  1.0
  O  O24  1  0.281  0.112  0.698  1.0
  O  O25  1  0.219  0.888  0.198  1.0
  O  O26  1  0.719  0.612  0.802  1.0
  O  O27  1  0.781  0.388  0.302  1.0
[/CIF]
.
The compound described by TaAsO5 crystallizes in the orthorhombic P2_12_12_1 space group. Ta(1) is bonded to one O(4), one O(5), two equivalent O(1), and two equivalent O(2) atoms to form TaO6 octahedra that share corners with four equivalent As(1)O4 tetrahedra and edges with two equivalent Ta(1)O6 octahedra. As(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form AsO4 tetrahedra that share corners with four equivalent Ta(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-55°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to two equivalent Ta(1) atoms. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Ta(1) and one As(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to one As(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Ta(1) and one As(1) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Ta(1) and one As(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_TaAsO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.303
_cell_length_b   7.741
_cell_length_c   8.379
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   408.811
_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
  Ta  Ta0  1  0.249  0.753  0.996  1.0
  Ta  Ta1  1  0.251  0.247  0.496  1.0
  Ta  Ta2  1  0.751  0.253  0.504  1.0
  Ta  Ta3  1  0.749  0.747  0.004  1.0
  As  As4  1  0.486  0.135  0.836  1.0
  As  As5  1  0.014  0.865  0.336  1.0
  As  As6  1  0.514  0.635  0.664  1.0
  As  As7  1  0.986  0.365  0.164  1.0
  O  O8  1  0.992  0.864  0.917  1.0
  O  O9  1  0.508  0.136  0.417  1.0
  O  O10  1  0.008  0.364  0.583  1.0
  O  O11  1  0.492  0.636  0.083  1.0
  O  O12  1  0.505  0.919  0.928  1.0
  O  O13  1  0.995  0.081  0.428  1.0
  O  O14  1  0.495  0.419  0.572  1.0
  O  O15  1  0.005  0.581  0.072  1.0
  O  O16  1  0.451  0.289  0.967  1.0
  O  O17  1  0.049  0.711  0.467  1.0
  O  O18  1  0.549  0.789  0.533  1.0
  O  O19  1  0.951  0.211  0.033  1.0
  O  O20  1  0.712  0.145  0.716  1.0
  O  O21  1  0.788  0.855  0.216  1.0
  O  O22  1  0.288  0.645  0.784  1.0
  O  O23  1  0.212  0.355  0.284  1.0
  O  O24  1  0.281  0.112  0.698  1.0
  O  O25  1  0.219  0.888  0.198  1.0
  O  O26  1  0.719  0.612  0.802  1.0
  O  O27  1  0.781  0.388  0.302  1.0
[/CIF]
.