The compound described by LaAsO4 crystallizes in the monoclinic P2_1/c space group. La(1) is bonded in a 9-coordinate geometry to two equivalent O(1), two equivalent O(3), two equivalent O(4), and three equivalent O(2) atoms. As(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent La(1) and one As(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to three equivalent La(1) and one As(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent La(1) and one As(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to two equivalent La(1) and one As(1) atom. is represented by the CIF file [CIF]
data_LaAsO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.229
_cell_length_b   6.787
_cell_length_c   8.441
_cell_angle_alpha   53.660
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   333.543
_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
  La  La0  1  0.654  0.817  0.282  1.0
  La  La1  1  0.154  0.183  0.218  1.0
  La  La2  1  0.346  0.183  0.718  1.0
  La  La3  1  0.846  0.817  0.782  1.0
  As  As4  1  0.663  0.309  0.304  1.0
  As  As5  1  0.163  0.691  0.196  1.0
  As  As6  1  0.337  0.691  0.696  1.0
  As  As7  1  0.837  0.309  0.804  1.0
  O  O8  1  0.609  0.342  0.483  1.0
  O  O9  1  0.109  0.658  0.017  1.0
  O  O10  1  0.391  0.658  0.517  1.0
  O  O11  1  0.891  0.342  0.983  1.0
  O  O12  1  0.841  0.106  0.391  1.0
  O  O13  1  0.341  0.894  0.109  1.0
  O  O14  1  0.159  0.894  0.609  1.0
  O  O15  1  0.659  0.106  0.891  1.0
  O  O16  1  0.786  0.602  0.618  1.0
  O  O17  1  0.286  0.398  0.882  1.0
  O  O18  1  0.214  0.398  0.382  1.0
  O  O19  1  0.714  0.602  0.118  1.0
  O  O20  1  0.003  0.177  0.754  1.0
  O  O21  1  0.503  0.823  0.746  1.0
  O  O22  1  0.997  0.823  0.246  1.0
  O  O23  1  0.497  0.177  0.254  1.0
[/CIF]
.
The compound described by LaAsO4 crystallizes in the monoclinic P2_1/c space group. La(1) is bonded in a 9-coordinate geometry to two equivalent O(1), two equivalent O(3), two equivalent O(4), and three equivalent O(2) atoms. As(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent La(1) and one As(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to three equivalent La(1) and one As(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent La(1) and one As(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to two equivalent La(1) and one As(1) atom. is represented by the CIF file [CIF]
data_LaAsO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.229
_cell_length_b   6.787
_cell_length_c   8.441
_cell_angle_alpha   53.660
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   333.543
_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
  La  La0  1  0.654  0.817  0.282  1.0
  La  La1  1  0.154  0.183  0.218  1.0
  La  La2  1  0.346  0.183  0.718  1.0
  La  La3  1  0.846  0.817  0.782  1.0
  As  As4  1  0.663  0.309  0.304  1.0
  As  As5  1  0.163  0.691  0.196  1.0
  As  As6  1  0.337  0.691  0.696  1.0
  As  As7  1  0.837  0.309  0.804  1.0
  O  O8  1  0.609  0.342  0.483  1.0
  O  O9  1  0.109  0.658  0.017  1.0
  O  O10  1  0.391  0.658  0.517  1.0
  O  O11  1  0.891  0.342  0.983  1.0
  O  O12  1  0.841  0.106  0.391  1.0
  O  O13  1  0.341  0.894  0.109  1.0
  O  O14  1  0.159  0.894  0.609  1.0
  O  O15  1  0.659  0.106  0.891  1.0
  O  O16  1  0.786  0.602  0.618  1.0
  O  O17  1  0.286  0.398  0.882  1.0
  O  O18  1  0.214  0.398  0.382  1.0
  O  O19  1  0.714  0.602  0.118  1.0
  O  O20  1  0.003  0.177  0.754  1.0
  O  O21  1  0.503  0.823  0.746  1.0
  O  O22  1  0.997  0.823  0.246  1.0
  O  O23  1  0.497  0.177  0.254  1.0
[/CIF]
.