The material structure described by Gd2AsO5 crystallizes in the tetragonal P4/n space group. Gd(1) is bonded in a 8-coordinate geometry to one O(3), one O(4), three equivalent O(1), and three equivalent O(2) atoms. There are two inequivalent As sites. In the first As site, As(1) is bonded in a distorted square co-planar geometry to four equivalent O(1) atoms. In the second As site, As(2) is bonded in a distorted square co-planar geometry to four equivalent O(2) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Gd(1) and one As(1) atom to form distorted OGd3As tetrahedra that share  a cornercorner with one O(3)Gd4 tetrahedra, corners with three equivalent O(1)Gd3As tetrahedra, corners with three equivalent O(4)Gd4 tetrahedra,  an edgeedge with one O(3)Gd4 tetrahedra, and edges with three equivalent O(1)Gd3As tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to three equivalent Gd(1) and one As(2) atom. In the third O site, O(3) is bonded to four equivalent Gd(1) atoms to form OGd4 tetrahedra that share corners with four equivalent O(1)Gd3As tetrahedra, edges with two equivalent O(4)Gd4 tetrahedra, and edges with four equivalent O(1)Gd3As tetrahedra. In the fourth O site, O(4) is bonded to four equivalent Gd(1) atoms to form OGd4 tetrahedra that share corners with twelve equivalent O(1)Gd3As tetrahedra and edges with two equivalent O(3)Gd4 tetrahedra. is represented by the CIF file [CIF]
data_Gd2AsO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.496
_cell_length_b   8.496
_cell_length_c   5.842
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   421.766
_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
  Gd  Gd0  1  0.358  0.349  0.249  1.0
  Gd  Gd1  1  0.651  0.358  0.751  1.0
  Gd  Gd2  1  0.349  0.642  0.751  1.0
  Gd  Gd3  1  0.642  0.651  0.249  1.0
  Gd  Gd4  1  0.858  0.849  0.751  1.0
  Gd  Gd5  1  0.151  0.858  0.249  1.0
  Gd  Gd6  1  0.849  0.142  0.249  1.0
  Gd  Gd7  1  0.142  0.151  0.751  1.0
  As  As8  1  0.000  0.500  0.544  1.0
  As  As9  1  0.000  0.500  0.140  1.0
  As  As10  1  0.500  0.000  0.456  1.0
  As  As11  1  0.500  0.000  0.860  1.0
  O  O12  1  0.914  0.306  0.606  1.0
  O  O13  1  0.089  0.305  0.099  1.0
  O  O14  1  0.805  0.411  0.099  1.0
  O  O15  1  0.194  0.414  0.606  1.0
  O  O16  1  0.500  0.500  0.500  1.0
  O  O17  1  0.500  0.500  0.000  1.0
  O  O18  1  0.806  0.586  0.606  1.0
  O  O19  1  0.195  0.589  0.099  1.0
  O  O20  1  0.911  0.695  0.099  1.0
  O  O21  1  0.086  0.694  0.606  1.0
  O  O22  1  0.414  0.806  0.394  1.0
  O  O23  1  0.589  0.805  0.901  1.0
  O  O24  1  0.305  0.911  0.901  1.0
  O  O25  1  0.694  0.914  0.394  1.0
  O  O26  1  0.000  0.000  0.500  1.0
  O  O27  1  0.000  0.000  0.000  1.0
  O  O28  1  0.306  0.086  0.394  1.0
  O  O29  1  0.695  0.089  0.901  1.0
  O  O30  1  0.411  0.195  0.901  1.0
  O  O31  1  0.586  0.194  0.394  1.0
[/CIF]
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The material structure described by Gd2AsO5 crystallizes in the tetragonal P4/n space group. Gd(1) is bonded in a 8-coordinate geometry to one O(3), one O(4), three equivalent O(1), and three equivalent O(2) atoms. There are two inequivalent As sites. In the first As site, As(1) is bonded in a distorted square co-planar geometry to four equivalent O(1) atoms. In the second As site, As(2) is bonded in a distorted square co-planar geometry to four equivalent O(2) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Gd(1) and one As(1) atom to form distorted OGd3As tetrahedra that share  a cornercorner with one O(3)Gd4 tetrahedra, corners with three equivalent O(1)Gd3As tetrahedra, corners with three equivalent O(4)Gd4 tetrahedra,  an edgeedge with one O(3)Gd4 tetrahedra, and edges with three equivalent O(1)Gd3As tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to three equivalent Gd(1) and one As(2) atom. In the third O site, O(3) is bonded to four equivalent Gd(1) atoms to form OGd4 tetrahedra that share corners with four equivalent O(1)Gd3As tetrahedra, edges with two equivalent O(4)Gd4 tetrahedra, and edges with four equivalent O(1)Gd3As tetrahedra. In the fourth O site, O(4) is bonded to four equivalent Gd(1) atoms to form OGd4 tetrahedra that share corners with twelve equivalent O(1)Gd3As tetrahedra and edges with two equivalent O(3)Gd4 tetrahedra. is represented by the CIF file [CIF]
data_Gd2AsO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.496
_cell_length_b   8.496
_cell_length_c   5.842
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   421.766
_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
  Gd  Gd0  1  0.358  0.349  0.249  1.0
  Gd  Gd1  1  0.651  0.358  0.751  1.0
  Gd  Gd2  1  0.349  0.642  0.751  1.0
  Gd  Gd3  1  0.642  0.651  0.249  1.0
  Gd  Gd4  1  0.858  0.849  0.751  1.0
  Gd  Gd5  1  0.151  0.858  0.249  1.0
  Gd  Gd6  1  0.849  0.142  0.249  1.0
  Gd  Gd7  1  0.142  0.151  0.751  1.0
  As  As8  1  0.000  0.500  0.544  1.0
  As  As9  1  0.000  0.500  0.140  1.0
  As  As10  1  0.500  0.000  0.456  1.0
  As  As11  1  0.500  0.000  0.860  1.0
  O  O12  1  0.914  0.306  0.606  1.0
  O  O13  1  0.089  0.305  0.099  1.0
  O  O14  1  0.805  0.411  0.099  1.0
  O  O15  1  0.194  0.414  0.606  1.0
  O  O16  1  0.500  0.500  0.500  1.0
  O  O17  1  0.500  0.500  0.000  1.0
  O  O18  1  0.806  0.586  0.606  1.0
  O  O19  1  0.195  0.589  0.099  1.0
  O  O20  1  0.911  0.695  0.099  1.0
  O  O21  1  0.086  0.694  0.606  1.0
  O  O22  1  0.414  0.806  0.394  1.0
  O  O23  1  0.589  0.805  0.901  1.0
  O  O24  1  0.305  0.911  0.901  1.0
  O  O25  1  0.694  0.914  0.394  1.0
  O  O26  1  0.000  0.000  0.500  1.0
  O  O27  1  0.000  0.000  0.000  1.0
  O  O28  1  0.306  0.086  0.394  1.0
  O  O29  1  0.695  0.089  0.901  1.0
  O  O30  1  0.411  0.195  0.901  1.0
  O  O31  1  0.586  0.194  0.394  1.0
[/CIF]
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