The material described by MnTa2O6 is Hydrophilite-derived structured and crystallizes in the monoclinic P2/c space group. There are three inequivalent Ta sites. In the first Ta site, Ta(1) is bonded to one O(1), one O(3), one O(5), one O(6), and two equivalent O(2) atoms to form distorted TaO6 octahedra that share corners with three equivalent Ta(2)O6 octahedra, corners with five equivalent Mn(1)O6 octahedra,  an edgeedge with one Ta(1)O6 octahedra, and  an edgeedge with one Ta(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-59°. In the second Ta site, Ta(2) is bonded to two equivalent O(1), two equivalent O(5), and two equivalent O(6) atoms to form TaO6 octahedra that share corners with two equivalent Ta(3)O6 octahedra, corners with six equivalent Ta(1)O6 octahedra, and edges with two equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-52°. In the third Ta site, Ta(3) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(6) atoms to form distorted TaO6 octahedra that share corners with two equivalent Ta(2)O6 octahedra, corners with six equivalent Mn(1)O6 octahedra, and edges with two equivalent Ta(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-56°. Mn(1) is bonded to one O(1), one O(2), one O(3), one O(5), and two equivalent O(4) atoms to form distorted MnO6 octahedra that share corners with three equivalent Ta(3)O6 octahedra, corners with five equivalent Ta(1)O6 octahedra,  an edgeedge with one Ta(2)O6 octahedra, and  an edgeedge with one Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-59°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Ta(1), one Ta(2), and one Mn(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to two equivalent Ta(1) and one Mn(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Ta(1), one Ta(3), and one Mn(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ta(3) and two equivalent Mn(1) atoms. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Ta(1), one Ta(2), and one Mn(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Ta(1), one Ta(2), and one Ta(3) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ta2MnO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.819
_cell_length_b   7.146
_cell_length_c   10.859
_cell_angle_alpha   75.623
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   437.403
_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  0.337  0.836  0.578  1.0
  Ta  Ta1  1  0.663  0.164  0.422  1.0
  Ta  Ta2  1  0.149  0.000  0.250  1.0
  Ta  Ta3  1  0.320  0.500  0.250  1.0
  Ta  Ta4  1  0.663  0.836  0.078  1.0
  Ta  Ta5  1  0.337  0.164  0.922  1.0
  Ta  Ta6  1  0.851  0.000  0.750  1.0
  Ta  Ta7  1  0.680  0.500  0.750  1.0
  Mn  Mn8  1  0.177  0.345  0.582  1.0
  Mn  Mn9  1  0.823  0.655  0.418  1.0
  Mn  Mn10  1  0.823  0.345  0.082  1.0
  Mn  Mn11  1  0.177  0.655  0.918  1.0
  O  O12  1  0.867  0.138  0.566  1.0
  O  O13  1  0.394  0.119  0.548  1.0
  O  O14  1  0.398  0.562  0.622  1.0
  O  O15  1  0.606  0.881  0.452  1.0
  O  O16  1  0.879  0.512  0.614  1.0
  O  O17  1  0.133  0.862  0.434  1.0
  O  O18  1  0.121  0.488  0.386  1.0
  O  O19  1  0.886  0.835  0.215  1.0
  O  O20  1  0.133  0.138  0.066  1.0
  O  O21  1  0.602  0.438  0.378  1.0
  O  O22  1  0.371  0.801  0.219  1.0
  O  O23  1  0.606  0.119  0.048  1.0
  O  O24  1  0.371  0.199  0.281  1.0
  O  O25  1  0.602  0.562  0.122  1.0
  O  O26  1  0.394  0.881  0.952  1.0
  O  O27  1  0.886  0.165  0.285  1.0
  O  O28  1  0.121  0.512  0.114  1.0
  O  O29  1  0.867  0.862  0.934  1.0
  O  O30  1  0.879  0.488  0.886  1.0
  O  O31  1  0.114  0.835  0.715  1.0
  O  O32  1  0.398  0.438  0.878  1.0
  O  O33  1  0.629  0.801  0.719  1.0
  O  O34  1  0.629  0.199  0.781  1.0
  O  O35  1  0.114  0.165  0.785  1.0
[/CIF]
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The material described by MnTa2O6 is Hydrophilite-derived structured and crystallizes in the monoclinic P2/c space group. There are three inequivalent Ta sites. In the first Ta site, Ta(1) is bonded to one O(1), one O(3), one O(5), one O(6), and two equivalent O(2) atoms to form distorted TaO6 octahedra that share corners with three equivalent Ta(2)O6 octahedra, corners with five equivalent Mn(1)O6 octahedra,  an edgeedge with one Ta(1)O6 octahedra, and  an edgeedge with one Ta(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-59°. In the second Ta site, Ta(2) is bonded to two equivalent O(1), two equivalent O(5), and two equivalent O(6) atoms to form TaO6 octahedra that share corners with two equivalent Ta(3)O6 octahedra, corners with six equivalent Ta(1)O6 octahedra, and edges with two equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-52°. In the third Ta site, Ta(3) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(6) atoms to form distorted TaO6 octahedra that share corners with two equivalent Ta(2)O6 octahedra, corners with six equivalent Mn(1)O6 octahedra, and edges with two equivalent Ta(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-56°. Mn(1) is bonded to one O(1), one O(2), one O(3), one O(5), and two equivalent O(4) atoms to form distorted MnO6 octahedra that share corners with three equivalent Ta(3)O6 octahedra, corners with five equivalent Ta(1)O6 octahedra,  an edgeedge with one Ta(2)O6 octahedra, and  an edgeedge with one Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-59°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Ta(1), one Ta(2), and one Mn(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to two equivalent Ta(1) and one Mn(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Ta(1), one Ta(3), and one Mn(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ta(3) and two equivalent Mn(1) atoms. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Ta(1), one Ta(2), and one Mn(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Ta(1), one Ta(2), and one Ta(3) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ta2MnO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.819
_cell_length_b   7.146
_cell_length_c   10.859
_cell_angle_alpha   75.623
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   437.403
_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  0.337  0.836  0.578  1.0
  Ta  Ta1  1  0.663  0.164  0.422  1.0
  Ta  Ta2  1  0.149  0.000  0.250  1.0
  Ta  Ta3  1  0.320  0.500  0.250  1.0
  Ta  Ta4  1  0.663  0.836  0.078  1.0
  Ta  Ta5  1  0.337  0.164  0.922  1.0
  Ta  Ta6  1  0.851  0.000  0.750  1.0
  Ta  Ta7  1  0.680  0.500  0.750  1.0
  Mn  Mn8  1  0.177  0.345  0.582  1.0
  Mn  Mn9  1  0.823  0.655  0.418  1.0
  Mn  Mn10  1  0.823  0.345  0.082  1.0
  Mn  Mn11  1  0.177  0.655  0.918  1.0
  O  O12  1  0.867  0.138  0.566  1.0
  O  O13  1  0.394  0.119  0.548  1.0
  O  O14  1  0.398  0.562  0.622  1.0
  O  O15  1  0.606  0.881  0.452  1.0
  O  O16  1  0.879  0.512  0.614  1.0
  O  O17  1  0.133  0.862  0.434  1.0
  O  O18  1  0.121  0.488  0.386  1.0
  O  O19  1  0.886  0.835  0.215  1.0
  O  O20  1  0.133  0.138  0.066  1.0
  O  O21  1  0.602  0.438  0.378  1.0
  O  O22  1  0.371  0.801  0.219  1.0
  O  O23  1  0.606  0.119  0.048  1.0
  O  O24  1  0.371  0.199  0.281  1.0
  O  O25  1  0.602  0.562  0.122  1.0
  O  O26  1  0.394  0.881  0.952  1.0
  O  O27  1  0.886  0.165  0.285  1.0
  O  O28  1  0.121  0.512  0.114  1.0
  O  O29  1  0.867  0.862  0.934  1.0
  O  O30  1  0.879  0.488  0.886  1.0
  O  O31  1  0.114  0.835  0.715  1.0
  O  O32  1  0.398  0.438  0.878  1.0
  O  O33  1  0.629  0.801  0.719  1.0
  O  O34  1  0.629  0.199  0.781  1.0
  O  O35  1  0.114  0.165  0.785  1.0
[/CIF]
.