The compound described by Na2PrSiO5 crystallizes in the orthorhombic Pnma space group. Na(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. Pr(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), two equivalent O(3), and four equivalent O(2) atoms. Si(1) is bonded in a tetrahedral geometry to one O(1), one O(4), and two equivalent O(2) atoms. There are four inequivalent O sites. In the first O site, O(4) is bonded in a 1-coordinate geometry to four equivalent Na(1), one Pr(1), and one Si(1) atom. In the second O site, O(1) is bonded in a 1-coordinate geometry to four equivalent Na(1), one Pr(1), and one Si(1) atom. In the third O site, O(2) is bonded in a 5-coordinate geometry to two equivalent Na(1), two equivalent Pr(1), and one Si(1) atom. In the fourth O site, O(3) is bonded in a 6-coordinate geometry to four equivalent Na(1) and two equivalent Pr(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2PrSiO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.651
_cell_length_b   7.504
_cell_length_c   9.557
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   477.010
_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
  Na  Na0  1  0.875  0.037  0.825  1.0
  Na  Na1  1  0.125  0.963  0.175  1.0
  Na  Na2  1  0.375  0.963  0.675  1.0
  Na  Na3  1  0.125  0.537  0.175  1.0
  Na  Na4  1  0.625  0.037  0.325  1.0
  Na  Na5  1  0.875  0.463  0.825  1.0
  Na  Na6  1  0.625  0.463  0.325  1.0
  Na  Na7  1  0.375  0.537  0.675  1.0
  Pr  Pr8  1  0.877  0.750  0.543  1.0
  Pr  Pr9  1  0.123  0.250  0.457  1.0
  Pr  Pr10  1  0.377  0.250  0.957  1.0
  Pr  Pr11  1  0.623  0.750  0.043  1.0
  Si  Si12  1  0.180  0.750  0.908  1.0
  Si  Si13  1  0.820  0.250  0.092  1.0
  Si  Si14  1  0.680  0.250  0.592  1.0
  Si  Si15  1  0.320  0.750  0.408  1.0
  O  O16  1  0.108  0.750  0.743  1.0
  O  O17  1  0.892  0.250  0.257  1.0
  O  O18  1  0.608  0.250  0.757  1.0
  O  O19  1  0.392  0.750  0.243  1.0
  O  O20  1  0.824  0.075  0.562  1.0
  O  O21  1  0.176  0.925  0.438  1.0
  O  O22  1  0.324  0.925  0.938  1.0
  O  O23  1  0.176  0.575  0.438  1.0
  O  O24  1  0.676  0.075  0.062  1.0
  O  O25  1  0.824  0.425  0.562  1.0
  O  O26  1  0.676  0.425  0.062  1.0
  O  O27  1  0.324  0.575  0.938  1.0
  O  O28  1  0.715  0.750  0.785  1.0
  O  O29  1  0.285  0.250  0.215  1.0
  O  O30  1  0.215  0.250  0.715  1.0
  O  O31  1  0.785  0.750  0.285  1.0
  O  O32  1  0.513  0.750  0.514  1.0
  O  O33  1  0.487  0.250  0.486  1.0
  O  O34  1  0.013  0.250  0.986  1.0
  O  O35  1  0.987  0.750  0.014  1.0
[/CIF]
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The compound described by Na2PrSiO5 crystallizes in the orthorhombic Pnma space group. Na(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. Pr(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), two equivalent O(3), and four equivalent O(2) atoms. Si(1) is bonded in a tetrahedral geometry to one O(1), one O(4), and two equivalent O(2) atoms. There are four inequivalent O sites. In the first O site, O(4) is bonded in a 1-coordinate geometry to four equivalent Na(1), one Pr(1), and one Si(1) atom. In the second O site, O(1) is bonded in a 1-coordinate geometry to four equivalent Na(1), one Pr(1), and one Si(1) atom. In the third O site, O(2) is bonded in a 5-coordinate geometry to two equivalent Na(1), two equivalent Pr(1), and one Si(1) atom. In the fourth O site, O(3) is bonded in a 6-coordinate geometry to four equivalent Na(1) and two equivalent Pr(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2PrSiO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.651
_cell_length_b   7.504
_cell_length_c   9.557
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   477.010
_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
  Na  Na0  1  0.875  0.037  0.825  1.0
  Na  Na1  1  0.125  0.963  0.175  1.0
  Na  Na2  1  0.375  0.963  0.675  1.0
  Na  Na3  1  0.125  0.537  0.175  1.0
  Na  Na4  1  0.625  0.037  0.325  1.0
  Na  Na5  1  0.875  0.463  0.825  1.0
  Na  Na6  1  0.625  0.463  0.325  1.0
  Na  Na7  1  0.375  0.537  0.675  1.0
  Pr  Pr8  1  0.877  0.750  0.543  1.0
  Pr  Pr9  1  0.123  0.250  0.457  1.0
  Pr  Pr10  1  0.377  0.250  0.957  1.0
  Pr  Pr11  1  0.623  0.750  0.043  1.0
  Si  Si12  1  0.180  0.750  0.908  1.0
  Si  Si13  1  0.820  0.250  0.092  1.0
  Si  Si14  1  0.680  0.250  0.592  1.0
  Si  Si15  1  0.320  0.750  0.408  1.0
  O  O16  1  0.108  0.750  0.743  1.0
  O  O17  1  0.892  0.250  0.257  1.0
  O  O18  1  0.608  0.250  0.757  1.0
  O  O19  1  0.392  0.750  0.243  1.0
  O  O20  1  0.824  0.075  0.562  1.0
  O  O21  1  0.176  0.925  0.438  1.0
  O  O22  1  0.324  0.925  0.938  1.0
  O  O23  1  0.176  0.575  0.438  1.0
  O  O24  1  0.676  0.075  0.062  1.0
  O  O25  1  0.824  0.425  0.562  1.0
  O  O26  1  0.676  0.425  0.062  1.0
  O  O27  1  0.324  0.575  0.938  1.0
  O  O28  1  0.715  0.750  0.785  1.0
  O  O29  1  0.285  0.250  0.215  1.0
  O  O30  1  0.215  0.250  0.715  1.0
  O  O31  1  0.785  0.750  0.285  1.0
  O  O32  1  0.513  0.750  0.514  1.0
  O  O33  1  0.487  0.250  0.486  1.0
  O  O34  1  0.013  0.250  0.986  1.0
  O  O35  1  0.987  0.750  0.014  1.0
[/CIF]
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