The material structure described by CaTe3O8 crystallizes in the monoclinic C2/c space group. Ca(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form corner-sharing TeO6 octahedra. In the second Te site, Te(2) is bonded to one O(2), one O(3), one O(4), and two equivalent O(1) atoms to form distorted TeO5 square pyramids that share corners with three equivalent Te(1)O6 octahedra and  an edgeedge with one Te(2)O5 square pyramid. The corner-sharing octahedral tilt angles range from 46-62°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Ca(1) and two equivalent Te(2) atoms. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Ca(1), one Te(1), and one Te(2) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Ca(1), one Te(1), and one Te(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ca(1), one Te(1), and one Te(2) atom. is represented by the CIF file [CIF]
data_CaTe3O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.864
_cell_length_b   6.864
_cell_length_c   10.025
_cell_angle_alpha   66.751
_cell_angle_beta   66.751
_cell_angle_gamma   49.012
_symmetry_Int_Tables_number   1
_cell_volume   321.190
_cell_formula_units_Z   2
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
  Ca  Ca0  1  0.437  0.563  0.250  1.0
  Ca  Ca1  1  0.563  0.437  0.750  1.0
  Te  Te2  1  0.000  0.000  0.500  1.0
  Te  Te3  1  0.000  0.000  0.000  1.0
  Te  Te4  1  0.307  0.129  0.642  1.0
  Te  Te5  1  0.871  0.693  0.858  1.0
  Te  Te6  1  0.693  0.871  0.358  1.0
  Te  Te7  1  0.129  0.307  0.142  1.0
  O  O8  1  0.789  0.578  0.090  1.0
  O  O9  1  0.422  0.211  0.410  1.0
  O  O10  1  0.211  0.422  0.910  1.0
  O  O11  1  0.578  0.789  0.590  1.0
  O  O12  1  0.194  0.014  0.093  1.0
  O  O13  1  0.986  0.806  0.407  1.0
  O  O14  1  0.806  0.986  0.907  1.0
  O  O15  1  0.014  0.194  0.593  1.0
  O  O16  1  0.863  0.300  0.339  1.0
  O  O17  1  0.700  0.137  0.161  1.0
  O  O18  1  0.137  0.700  0.661  1.0
  O  O19  1  0.300  0.863  0.839  1.0
  O  O20  1  0.859  0.341  0.882  1.0
  O  O21  1  0.659  0.141  0.618  1.0
  O  O22  1  0.141  0.659  0.118  1.0
  O  O23  1  0.341  0.859  0.382  1.0
[/CIF]
.
The material structure described by CaTe3O8 crystallizes in the monoclinic C2/c space group. Ca(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form corner-sharing TeO6 octahedra. In the second Te site, Te(2) is bonded to one O(2), one O(3), one O(4), and two equivalent O(1) atoms to form distorted TeO5 square pyramids that share corners with three equivalent Te(1)O6 octahedra and  an edgeedge with one Te(2)O5 square pyramid. The corner-sharing octahedral tilt angles range from 46-62°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Ca(1) and two equivalent Te(2) atoms. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Ca(1), one Te(1), and one Te(2) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Ca(1), one Te(1), and one Te(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ca(1), one Te(1), and one Te(2) atom. is represented by the CIF file [CIF]
data_CaTe3O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.864
_cell_length_b   6.864
_cell_length_c   10.025
_cell_angle_alpha   66.751
_cell_angle_beta   66.751
_cell_angle_gamma   49.012
_symmetry_Int_Tables_number   1
_cell_volume   321.190
_cell_formula_units_Z   2
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
  Ca  Ca0  1  0.437  0.563  0.250  1.0
  Ca  Ca1  1  0.563  0.437  0.750  1.0
  Te  Te2  1  0.000  0.000  0.500  1.0
  Te  Te3  1  0.000  0.000  0.000  1.0
  Te  Te4  1  0.307  0.129  0.642  1.0
  Te  Te5  1  0.871  0.693  0.858  1.0
  Te  Te6  1  0.693  0.871  0.358  1.0
  Te  Te7  1  0.129  0.307  0.142  1.0
  O  O8  1  0.789  0.578  0.090  1.0
  O  O9  1  0.422  0.211  0.410  1.0
  O  O10  1  0.211  0.422  0.910  1.0
  O  O11  1  0.578  0.789  0.590  1.0
  O  O12  1  0.194  0.014  0.093  1.0
  O  O13  1  0.986  0.806  0.407  1.0
  O  O14  1  0.806  0.986  0.907  1.0
  O  O15  1  0.014  0.194  0.593  1.0
  O  O16  1  0.863  0.300  0.339  1.0
  O  O17  1  0.700  0.137  0.161  1.0
  O  O18  1  0.137  0.700  0.661  1.0
  O  O19  1  0.300  0.863  0.839  1.0
  O  O20  1  0.859  0.341  0.882  1.0
  O  O21  1  0.659  0.141  0.618  1.0
  O  O22  1  0.141  0.659  0.118  1.0
  O  O23  1  0.341  0.859  0.382  1.0
[/CIF]
.