The compound described by Na6LaTa3(SiO4)6 crystallizes in the triclinic P1 space group. There are six inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted hexagonal planar geometry to one O(1), one O(11), one O(21), one O(23), one O(3), and one O(9) atom. In the second Na site, Na(2) is bonded to one O(10), one O(12), one O(2), one O(22), one O(24), and one O(4) atom to form distorted NaO6 octahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra,  a faceface with one La(1)O6 octahedra, and  a faceface with one Ta(2)O6 octahedra. In the third Na site, Na(3) is bonded in a 8-coordinate geometry to one O(1), one O(13), one O(14), one O(19), one O(2), one O(20), one O(21), and one O(22) atom. In the fourth Na site, Na(4) is bonded in a 8-coordinate geometry to one O(16), one O(17), one O(18), one O(20), one O(23), one O(24), one O(3), and one O(4) atom. In the fifth Na site, Na(5) is bonded in a 3-coordinate geometry to one O(11), one O(12), one O(14), one O(23), and one O(4) atom. In the sixth Na site, Na(6) is bonded in a 4-coordinate geometry to one O(10), one O(16), one O(2), one O(21), one O(6), and one O(9) atom. La(1) is bonded to one O(12), one O(14), one O(17), one O(24), one O(4), and one O(6) atom to form distorted LaO6 octahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra, and  a faceface with one Na(2)O6 octahedra. There are three inequivalent Ta sites. In the first Ta site, Ta(1) is bonded to one O(1), one O(15), one O(20), one O(21), one O(7), and one O(9) atom to form TaO6 octahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, and  a cornercorner with one Si(6)O4 tetrahedra. In the second Ta site, Ta(2) is bonded to one O(10), one O(16), one O(19), one O(2), one O(22), and one O(8) atom to form TaO6 octahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra, and  a faceface with one Na(2)O6 octahedra. In the third Ta site, Ta(3) is bonded to one O(11), one O(13), one O(18), one O(23), one O(3), and one O(5) atom to form TaO6 octahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, and  a cornercorner with one Si(6)O4 tetrahedra. There are six inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(21), one O(22), one O(5), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(2)O6 octahedra,  a cornercorner with one La(1)O6 octahedra,  a cornercorner with one Ta(1)O6 octahedra,  a cornercorner with one Ta(2)O6 octahedra, and  a cornercorner with one Ta(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 21-58°. In the second Si site, Si(2) is bonded to one O(23), one O(24), one O(7), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(2)O6 octahedra,  a cornercorner with one La(1)O6 octahedra,  a cornercorner with one Ta(1)O6 octahedra,  a cornercorner with one Ta(2)O6 octahedra, and  a cornercorner with one Ta(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 20-51°. In the third Si site, Si(3) is bonded to one O(13), one O(17), one O(2), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(2)O6 octahedra,  a cornercorner with one La(1)O6 octahedra,  a cornercorner with one Ta(1)O6 octahedra,  a cornercorner with one Ta(2)O6 octahedra, and  a cornercorner with one Ta(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 14-52°. In the fourth Si site, Si(4) is bonded to one O(1), one O(10), one O(14), and one O(18) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(2)O6 octahedra,  a cornercorner with one La(1)O6 octahedra,  a cornercorner with one Ta(1)O6 octahedra,  a cornercorner with one Ta(2)O6 octahedra, and  a cornercorner with one Ta(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 20-57°. In the fifth Si site, Si(5) is bonded to one O(11), one O(15), one O(19), and one O(4) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(2)O6 octahedra,  a cornercorner with one La(1)O6 octahedra,  a cornercorner with one Ta(1)O6 octahedra,  a cornercorner with one Ta(2)O6 octahedra, and  a cornercorner with one Ta(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 16-42°. In the sixth Si site, Si(6) is bonded to one O(12), one O(16), one O(20), and one O(3) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(2)O6 octahedra,  a cornercorner with one La(1)O6 octahedra,  a cornercorner with one Ta(1)O6 octahedra,  a cornercorner with one Ta(2)O6 octahedra, and  a cornercorner with one Ta(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 20-47°. There are twenty-four inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Na(1), one Na(3), one Ta(1), and one Si(4) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Na(2), one Na(3), one Na(6), one Ta(2), and one Si(3) atom. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Na(4), one Ta(3), and one Si(6) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Na(2), one Na(4), one Na(5), one La(1), and one Si(5) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Ta(3) and one Si(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Na(6), one La(1), and one Si(1) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one Ta(1) and one Si(2) atom. In the eighth O site, O(8) is bonded in a distorted bent 150 degrees geometry to one Ta(2) and one Si(2) atom. In the ninth O site, O(9) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Na(6), one Ta(1), and one Si(3) atom. In the tenth O site, O(10) is bonded in a distorted trigonal pyramidal geometry to one Na(2), one Na(6), one Ta(2), and one Si(4) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Na(1), one Na(5), one Ta(3), and one Si(5) atom. In the twelfth O site, O(12) is bonded in a distorted rectangular see-saw-like geometry to one Na(2), one Na(5), one La(1), and one Si(6) atom. In the thirteenth O site, O(13) is bonded in a distorted linear geometry to one Na(3), one Ta(3), and one Si(3) atom. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Na(3), one Na(5), one La(1), and one Si(4) atom. In the fifteenth O site, O(15) is bonded in a linear geometry to one Ta(1) and one Si(5) atom. In the sixteenth O site, O(16) is bonded in a 3-coordinate geometry to one Na(4), one Na(6), one Ta(2), and one Si(6) atom. In the seventeenth O site, O(17) is bonded in a 3-coordinate geometry to one Na(4), one La(1), and one Si(3) atom. In the eighteenth O site, O(18) is bonded in a distorted bent 150 degrees geometry to one Na(4), one Ta(3), and one Si(4) atom. In the nineteenth O site, O(19) is bonded in a distorted bent 150 degrees geometry to one Na(3), one Ta(2), and one Si(5) atom. In the twentieth O site, O(20) is bonded in a distorted bent 150 degrees geometry to one Na(3), one Na(4), one Ta(1), and one Si(6) atom. In the twenty-first O site, O(21) is bonded in a 5-coordinate geometry to one Na(1), one Na(3), one Na(6), one Ta(1), and one Si(1) atom. In the twenty-second O site, O(22) is bonded in a 4-coordinate geometry to one Na(2), one Na(3), one Ta(2), and one Si(1) atom. In the twenty-third O site, O(23) is bonded in a 4-coordinate geometry to one Na(1), one Na(4), one Na(5), one Ta(3), and one Si(2) atom. In the twenty-fourth O site, O(24) is bonded in a distorted rectangular see-saw-like geometry to one Na(2), one Na(4), one La(1), and one Si(2) atom. is represented by the CIF card [CIF]
data_Na6LaTa3(SiO4)6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.175
_cell_length_b   9.181
_cell_length_c   9.204
_cell_angle_alpha   119.774
_cell_angle_beta   90.212
_cell_angle_gamma   119.665
_symmetry_Int_Tables_number   1
_cell_volume   551.825
_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
  La  La0  1  0.139  0.803  0.862  1.0
  Na  Na1  1  0.499  0.497  0.497  1.0
  Na  Na2  1  0.002  0.503  0.998  1.0
  Na  Na3  1  0.583  0.994  0.745  1.0
  Na  Na4  1  0.398  0.993  0.236  1.0
  Na  Na5  1  0.110  0.380  0.589  1.0
  Na  Na6  1  0.893  0.635  0.426  1.0
  O  O7  1  0.418  0.687  0.404  1.0
  O  O8  1  0.735  0.302  0.057  1.0
  O  O9  1  0.558  0.284  0.548  1.0
  O  O10  1  0.287  0.682  0.945  1.0
  O  O11  1  0.135  0.142  0.713  1.0
  O  O12  1  0.949  0.830  0.738  1.0
  O  O13  1  0.881  0.906  0.332  1.0
  O  O14  1  0.996  0.134  0.215  1.0
  O  O15  1  0.610  0.519  0.241  1.0
  O  O16  1  0.065  0.510  0.271  1.0
  O  O17  1  0.449  0.508  0.771  1.0
  O  O18  1  0.904  0.440  0.708  1.0
  O  O19  1  0.488  0.270  0.864  1.0
  O  O20  1  0.230  0.685  0.612  1.0
  O  O21  1  0.534  0.707  0.122  1.0
  O  O22  1  0.785  0.289  0.359  1.0
  O  O23  1  0.403  0.119  0.062  1.0
  O  O24  1  0.283  0.921  0.500  1.0
  O  O25  1  0.639  0.927  0.993  1.0
  O  O26  1  0.666  0.048  0.467  1.0
  O  O27  1  0.763  0.881  0.590  1.0
  O  O28  1  0.937  0.168  0.929  1.0
  O  O29  1  0.227  0.184  0.445  1.0
  O  O30  1  0.071  0.841  0.121  1.0
  Si  Si31  1  0.951  0.010  0.746  1.0
  Si  Si32  1  0.044  0.008  0.268  1.0
  Si  Si33  1  0.554  0.304  0.057  1.0
  Si  Si34  1  0.248  0.699  0.444  1.0
  Si  Si35  1  0.473  0.704  0.953  1.0
  Si  Si36  1  0.735  0.278  0.531  1.0
  Ta  Ta37  1  0.643  0.790  0.349  1.0
  Ta  Ta38  1  0.859  0.207  0.140  1.0
  Ta  Ta39  1  0.356  0.213  0.652  1.0
[/CIF]
.
The compound described by Na6LaTa3(SiO4)6 crystallizes in the triclinic P1 space group. There are six inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted hexagonal planar geometry to one O(1), one O(11), one O(21), one O(23), one O(3), and one O(9) atom. In the second Na site, Na(2) is bonded to one O(10), one O(12), one O(2), one O(22), one O(24), and one O(4) atom to form distorted NaO6 octahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra,  a faceface with one La(1)O6 octahedra, and  a faceface with one Ta(2)O6 octahedra. In the third Na site, Na(3) is bonded in a 8-coordinate geometry to one O(1), one O(13), one O(14), one O(19), one O(2), one O(20), one O(21), and one O(22) atom. In the fourth Na site, Na(4) is bonded in a 8-coordinate geometry to one O(16), one O(17), one O(18), one O(20), one O(23), one O(24), one O(3), and one O(4) atom. In the fifth Na site, Na(5) is bonded in a 3-coordinate geometry to one O(11), one O(12), one O(14), one O(23), and one O(4) atom. In the sixth Na site, Na(6) is bonded in a 4-coordinate geometry to one O(10), one O(16), one O(2), one O(21), one O(6), and one O(9) atom. La(1) is bonded to one O(12), one O(14), one O(17), one O(24), one O(4), and one O(6) atom to form distorted LaO6 octahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra, and  a faceface with one Na(2)O6 octahedra. There are three inequivalent Ta sites. In the first Ta site, Ta(1) is bonded to one O(1), one O(15), one O(20), one O(21), one O(7), and one O(9) atom to form TaO6 octahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, and  a cornercorner with one Si(6)O4 tetrahedra. In the second Ta site, Ta(2) is bonded to one O(10), one O(16), one O(19), one O(2), one O(22), and one O(8) atom to form TaO6 octahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra, and  a faceface with one Na(2)O6 octahedra. In the third Ta site, Ta(3) is bonded to one O(11), one O(13), one O(18), one O(23), one O(3), and one O(5) atom to form TaO6 octahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, and  a cornercorner with one Si(6)O4 tetrahedra. There are six inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(21), one O(22), one O(5), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(2)O6 octahedra,  a cornercorner with one La(1)O6 octahedra,  a cornercorner with one Ta(1)O6 octahedra,  a cornercorner with one Ta(2)O6 octahedra, and  a cornercorner with one Ta(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 21-58°. In the second Si site, Si(2) is bonded to one O(23), one O(24), one O(7), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(2)O6 octahedra,  a cornercorner with one La(1)O6 octahedra,  a cornercorner with one Ta(1)O6 octahedra,  a cornercorner with one Ta(2)O6 octahedra, and  a cornercorner with one Ta(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 20-51°. In the third Si site, Si(3) is bonded to one O(13), one O(17), one O(2), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(2)O6 octahedra,  a cornercorner with one La(1)O6 octahedra,  a cornercorner with one Ta(1)O6 octahedra,  a cornercorner with one Ta(2)O6 octahedra, and  a cornercorner with one Ta(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 14-52°. In the fourth Si site, Si(4) is bonded to one O(1), one O(10), one O(14), and one O(18) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(2)O6 octahedra,  a cornercorner with one La(1)O6 octahedra,  a cornercorner with one Ta(1)O6 octahedra,  a cornercorner with one Ta(2)O6 octahedra, and  a cornercorner with one Ta(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 20-57°. In the fifth Si site, Si(5) is bonded to one O(11), one O(15), one O(19), and one O(4) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(2)O6 octahedra,  a cornercorner with one La(1)O6 octahedra,  a cornercorner with one Ta(1)O6 octahedra,  a cornercorner with one Ta(2)O6 octahedra, and  a cornercorner with one Ta(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 16-42°. In the sixth Si site, Si(6) is bonded to one O(12), one O(16), one O(20), and one O(3) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(2)O6 octahedra,  a cornercorner with one La(1)O6 octahedra,  a cornercorner with one Ta(1)O6 octahedra,  a cornercorner with one Ta(2)O6 octahedra, and  a cornercorner with one Ta(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 20-47°. There are twenty-four inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Na(1), one Na(3), one Ta(1), and one Si(4) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Na(2), one Na(3), one Na(6), one Ta(2), and one Si(3) atom. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Na(4), one Ta(3), and one Si(6) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Na(2), one Na(4), one Na(5), one La(1), and one Si(5) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Ta(3) and one Si(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Na(6), one La(1), and one Si(1) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one Ta(1) and one Si(2) atom. In the eighth O site, O(8) is bonded in a distorted bent 150 degrees geometry to one Ta(2) and one Si(2) atom. In the ninth O site, O(9) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), one Na(6), one Ta(1), and one Si(3) atom. In the tenth O site, O(10) is bonded in a distorted trigonal pyramidal geometry to one Na(2), one Na(6), one Ta(2), and one Si(4) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Na(1), one Na(5), one Ta(3), and one Si(5) atom. In the twelfth O site, O(12) is bonded in a distorted rectangular see-saw-like geometry to one Na(2), one Na(5), one La(1), and one Si(6) atom. In the thirteenth O site, O(13) is bonded in a distorted linear geometry to one Na(3), one Ta(3), and one Si(3) atom. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Na(3), one Na(5), one La(1), and one Si(4) atom. In the fifteenth O site, O(15) is bonded in a linear geometry to one Ta(1) and one Si(5) atom. In the sixteenth O site, O(16) is bonded in a 3-coordinate geometry to one Na(4), one Na(6), one Ta(2), and one Si(6) atom. In the seventeenth O site, O(17) is bonded in a 3-coordinate geometry to one Na(4), one La(1), and one Si(3) atom. In the eighteenth O site, O(18) is bonded in a distorted bent 150 degrees geometry to one Na(4), one Ta(3), and one Si(4) atom. In the nineteenth O site, O(19) is bonded in a distorted bent 150 degrees geometry to one Na(3), one Ta(2), and one Si(5) atom. In the twentieth O site, O(20) is bonded in a distorted bent 150 degrees geometry to one Na(3), one Na(4), one Ta(1), and one Si(6) atom. In the twenty-first O site, O(21) is bonded in a 5-coordinate geometry to one Na(1), one Na(3), one Na(6), one Ta(1), and one Si(1) atom. In the twenty-second O site, O(22) is bonded in a 4-coordinate geometry to one Na(2), one Na(3), one Ta(2), and one Si(1) atom. In the twenty-third O site, O(23) is bonded in a 4-coordinate geometry to one Na(1), one Na(4), one Na(5), one Ta(3), and one Si(2) atom. In the twenty-fourth O site, O(24) is bonded in a distorted rectangular see-saw-like geometry to one Na(2), one Na(4), one La(1), and one Si(2) atom. is represented by the CIF card [CIF]
data_Na6LaTa3(SiO4)6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.175
_cell_length_b   9.181
_cell_length_c   9.204
_cell_angle_alpha   119.774
_cell_angle_beta   90.212
_cell_angle_gamma   119.665
_symmetry_Int_Tables_number   1
_cell_volume   551.825
_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
  La  La0  1  0.139  0.803  0.862  1.0
  Na  Na1  1  0.499  0.497  0.497  1.0
  Na  Na2  1  0.002  0.503  0.998  1.0
  Na  Na3  1  0.583  0.994  0.745  1.0
  Na  Na4  1  0.398  0.993  0.236  1.0
  Na  Na5  1  0.110  0.380  0.589  1.0
  Na  Na6  1  0.893  0.635  0.426  1.0
  O  O7  1  0.418  0.687  0.404  1.0
  O  O8  1  0.735  0.302  0.057  1.0
  O  O9  1  0.558  0.284  0.548  1.0
  O  O10  1  0.287  0.682  0.945  1.0
  O  O11  1  0.135  0.142  0.713  1.0
  O  O12  1  0.949  0.830  0.738  1.0
  O  O13  1  0.881  0.906  0.332  1.0
  O  O14  1  0.996  0.134  0.215  1.0
  O  O15  1  0.610  0.519  0.241  1.0
  O  O16  1  0.065  0.510  0.271  1.0
  O  O17  1  0.449  0.508  0.771  1.0
  O  O18  1  0.904  0.440  0.708  1.0
  O  O19  1  0.488  0.270  0.864  1.0
  O  O20  1  0.230  0.685  0.612  1.0
  O  O21  1  0.534  0.707  0.122  1.0
  O  O22  1  0.785  0.289  0.359  1.0
  O  O23  1  0.403  0.119  0.062  1.0
  O  O24  1  0.283  0.921  0.500  1.0
  O  O25  1  0.639  0.927  0.993  1.0
  O  O26  1  0.666  0.048  0.467  1.0
  O  O27  1  0.763  0.881  0.590  1.0
  O  O28  1  0.937  0.168  0.929  1.0
  O  O29  1  0.227  0.184  0.445  1.0
  O  O30  1  0.071  0.841  0.121  1.0
  Si  Si31  1  0.951  0.010  0.746  1.0
  Si  Si32  1  0.044  0.008  0.268  1.0
  Si  Si33  1  0.554  0.304  0.057  1.0
  Si  Si34  1  0.248  0.699  0.444  1.0
  Si  Si35  1  0.473  0.704  0.953  1.0
  Si  Si36  1  0.735  0.278  0.531  1.0
  Ta  Ta37  1  0.643  0.790  0.349  1.0
  Ta  Ta38  1  0.859  0.207  0.140  1.0
  Ta  Ta39  1  0.356  0.213  0.652  1.0
[/CIF]
.