The crystal structure described by Pr2SiTeO4 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 4-coordinate geometry to four equivalent Te(1), one O(2), one O(3), and two equivalent O(4) atoms. In the second Pr site, Pr(2) is bonded in a 9-coordinate geometry to one Te(1), one O(4), two equivalent O(2), two equivalent O(3), and three equivalent O(1) atoms. Si(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. Te(1) is bonded to one Pr(2) and four equivalent Pr(1) atoms to form distorted TePr5 square pyramids that share corners with four equivalent Te(1)Pr5 square pyramids, corners with five equivalent O(4)Pr3Si trigonal pyramids, edges with four equivalent Te(1)Pr5 square pyramids, and edges with two equivalent O(4)Pr3Si trigonal pyramids. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to three equivalent Pr(2) and one Si(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Pr(1), two equivalent Pr(2), and one Si(1) atom. In the third O site, O(3) is bonded in a 1-coordinate geometry to one Pr(1), two equivalent Pr(2), and one Si(1) atom. In the fourth O site, O(4) is bonded to one Pr(2), two equivalent Pr(1), and one Si(1) atom to form distorted OPr3Si trigonal pyramids that share corners with five equivalent Te(1)Pr5 square pyramids, corners with two equivalent O(4)Pr3Si trigonal pyramids, and edges with two equivalent Te(1)Pr5 square pyramids. is represented by the CIF file [CIF]
data_Pr2SiTeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.492
_cell_length_b   8.764
_cell_length_c   9.917
_cell_angle_alpha   85.541
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   562.481
_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
  Pr  Pr0  1  0.695  0.335  0.154  1.0
  Pr  Pr1  1  0.195  0.165  0.846  1.0
  Pr  Pr2  1  0.305  0.665  0.846  1.0
  Pr  Pr3  1  0.805  0.835  0.154  1.0
  Pr  Pr4  1  0.152  0.193  0.396  1.0
  Pr  Pr5  1  0.652  0.307  0.604  1.0
  Pr  Pr6  1  0.848  0.807  0.604  1.0
  Pr  Pr7  1  0.348  0.693  0.396  1.0
  Si  Si8  1  0.690  0.057  0.375  1.0
  Si  Si9  1  0.190  0.443  0.625  1.0
  Si  Si10  1  0.310  0.943  0.625  1.0
  Si  Si11  1  0.810  0.557  0.375  1.0
  Te  Te12  1  0.214  0.386  0.096  1.0
  Te  Te13  1  0.714  0.114  0.904  1.0
  Te  Te14  1  0.786  0.614  0.904  1.0
  Te  Te15  1  0.286  0.886  0.096  1.0
  O  O16  1  0.308  0.421  0.482  1.0
  O  O17  1  0.808  0.079  0.518  1.0
  O  O18  1  0.692  0.579  0.518  1.0
  O  O19  1  0.192  0.921  0.482  1.0
  O  O20  1  0.867  0.377  0.375  1.0
  O  O21  1  0.367  0.123  0.625  1.0
  O  O22  1  0.133  0.623  0.625  1.0
  O  O23  1  0.633  0.877  0.375  1.0
  O  O24  1  0.513  0.184  0.348  1.0
  O  O25  1  0.013  0.316  0.652  1.0
  O  O26  1  0.487  0.816  0.652  1.0
  O  O27  1  0.987  0.684  0.348  1.0
  O  O28  1  0.856  0.090  0.252  1.0
  O  O29  1  0.356  0.410  0.748  1.0
  O  O30  1  0.144  0.910  0.748  1.0
  O  O31  1  0.644  0.590  0.252  1.0
[/CIF]
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The crystal structure described by Pr2SiTeO4 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 4-coordinate geometry to four equivalent Te(1), one O(2), one O(3), and two equivalent O(4) atoms. In the second Pr site, Pr(2) is bonded in a 9-coordinate geometry to one Te(1), one O(4), two equivalent O(2), two equivalent O(3), and three equivalent O(1) atoms. Si(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. Te(1) is bonded to one Pr(2) and four equivalent Pr(1) atoms to form distorted TePr5 square pyramids that share corners with four equivalent Te(1)Pr5 square pyramids, corners with five equivalent O(4)Pr3Si trigonal pyramids, edges with four equivalent Te(1)Pr5 square pyramids, and edges with two equivalent O(4)Pr3Si trigonal pyramids. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to three equivalent Pr(2) and one Si(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Pr(1), two equivalent Pr(2), and one Si(1) atom. In the third O site, O(3) is bonded in a 1-coordinate geometry to one Pr(1), two equivalent Pr(2), and one Si(1) atom. In the fourth O site, O(4) is bonded to one Pr(2), two equivalent Pr(1), and one Si(1) atom to form distorted OPr3Si trigonal pyramids that share corners with five equivalent Te(1)Pr5 square pyramids, corners with two equivalent O(4)Pr3Si trigonal pyramids, and edges with two equivalent Te(1)Pr5 square pyramids. is represented by the CIF file [CIF]
data_Pr2SiTeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.492
_cell_length_b   8.764
_cell_length_c   9.917
_cell_angle_alpha   85.541
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   562.481
_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
  Pr  Pr0  1  0.695  0.335  0.154  1.0
  Pr  Pr1  1  0.195  0.165  0.846  1.0
  Pr  Pr2  1  0.305  0.665  0.846  1.0
  Pr  Pr3  1  0.805  0.835  0.154  1.0
  Pr  Pr4  1  0.152  0.193  0.396  1.0
  Pr  Pr5  1  0.652  0.307  0.604  1.0
  Pr  Pr6  1  0.848  0.807  0.604  1.0
  Pr  Pr7  1  0.348  0.693  0.396  1.0
  Si  Si8  1  0.690  0.057  0.375  1.0
  Si  Si9  1  0.190  0.443  0.625  1.0
  Si  Si10  1  0.310  0.943  0.625  1.0
  Si  Si11  1  0.810  0.557  0.375  1.0
  Te  Te12  1  0.214  0.386  0.096  1.0
  Te  Te13  1  0.714  0.114  0.904  1.0
  Te  Te14  1  0.786  0.614  0.904  1.0
  Te  Te15  1  0.286  0.886  0.096  1.0
  O  O16  1  0.308  0.421  0.482  1.0
  O  O17  1  0.808  0.079  0.518  1.0
  O  O18  1  0.692  0.579  0.518  1.0
  O  O19  1  0.192  0.921  0.482  1.0
  O  O20  1  0.867  0.377  0.375  1.0
  O  O21  1  0.367  0.123  0.625  1.0
  O  O22  1  0.133  0.623  0.625  1.0
  O  O23  1  0.633  0.877  0.375  1.0
  O  O24  1  0.513  0.184  0.348  1.0
  O  O25  1  0.013  0.316  0.652  1.0
  O  O26  1  0.487  0.816  0.652  1.0
  O  O27  1  0.987  0.684  0.348  1.0
  O  O28  1  0.856  0.090  0.252  1.0
  O  O29  1  0.356  0.410  0.748  1.0
  O  O30  1  0.144  0.910  0.748  1.0
  O  O31  1  0.644  0.590  0.252  1.0
[/CIF]
.