The crystal structure described by SmAsO4 is Zircon-like structured and crystallizes in the monoclinic P2_1/c space group. Sm(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. 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 Sm(1) and one As(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Sm(1) and one As(1) atom. In the third O site, O(3) is bonded in a 1-coordinate geometry to two equivalent Sm(1) and one As(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Sm(1) and one As(1) atom. is represented by the CIF file [CIF]
data_SmAsO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.118
_cell_length_b   6.717
_cell_length_c   8.291
_cell_angle_alpha   53.862
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   320.101
_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
  Sm  Sm0  1  0.850  0.811  0.783  1.0
  Sm  Sm1  1  0.350  0.189  0.717  1.0
  Sm  Sm2  1  0.650  0.811  0.283  1.0
  Sm  Sm3  1  0.150  0.189  0.217  1.0
  As  As4  1  0.838  0.310  0.802  1.0
  As  As5  1  0.338  0.690  0.698  1.0
  As  As6  1  0.662  0.310  0.302  1.0
  As  As7  1  0.162  0.690  0.198  1.0
  O  O8  1  0.894  0.352  0.983  1.0
  O  O9  1  0.286  0.388  0.885  1.0
  O  O10  1  0.654  0.104  0.895  1.0
  O  O11  1  0.505  0.831  0.748  1.0
  O  O12  1  0.786  0.612  0.615  1.0
  O  O13  1  0.005  0.169  0.752  1.0
  O  O14  1  0.154  0.896  0.605  1.0
  O  O15  1  0.394  0.648  0.517  1.0
  O  O16  1  0.606  0.352  0.483  1.0
  O  O17  1  0.846  0.104  0.395  1.0
  O  O18  1  0.995  0.831  0.248  1.0
  O  O19  1  0.214  0.388  0.385  1.0
  O  O20  1  0.495  0.169  0.252  1.0
  O  O21  1  0.346  0.896  0.105  1.0
  O  O22  1  0.714  0.612  0.115  1.0
  O  O23  1  0.106  0.648  0.017  1.0
[/CIF]
.
The crystal structure described by SmAsO4 is Zircon-like structured and crystallizes in the monoclinic P2_1/c space group. Sm(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. 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 Sm(1) and one As(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Sm(1) and one As(1) atom. In the third O site, O(3) is bonded in a 1-coordinate geometry to two equivalent Sm(1) and one As(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Sm(1) and one As(1) atom. is represented by the CIF file [CIF]
data_SmAsO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.118
_cell_length_b   6.717
_cell_length_c   8.291
_cell_angle_alpha   53.862
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   320.101
_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
  Sm  Sm0  1  0.850  0.811  0.783  1.0
  Sm  Sm1  1  0.350  0.189  0.717  1.0
  Sm  Sm2  1  0.650  0.811  0.283  1.0
  Sm  Sm3  1  0.150  0.189  0.217  1.0
  As  As4  1  0.838  0.310  0.802  1.0
  As  As5  1  0.338  0.690  0.698  1.0
  As  As6  1  0.662  0.310  0.302  1.0
  As  As7  1  0.162  0.690  0.198  1.0
  O  O8  1  0.894  0.352  0.983  1.0
  O  O9  1  0.286  0.388  0.885  1.0
  O  O10  1  0.654  0.104  0.895  1.0
  O  O11  1  0.505  0.831  0.748  1.0
  O  O12  1  0.786  0.612  0.615  1.0
  O  O13  1  0.005  0.169  0.752  1.0
  O  O14  1  0.154  0.896  0.605  1.0
  O  O15  1  0.394  0.648  0.517  1.0
  O  O16  1  0.606  0.352  0.483  1.0
  O  O17  1  0.846  0.104  0.395  1.0
  O  O18  1  0.995  0.831  0.248  1.0
  O  O19  1  0.214  0.388  0.385  1.0
  O  O20  1  0.495  0.169  0.252  1.0
  O  O21  1  0.346  0.896  0.105  1.0
  O  O22  1  0.714  0.612  0.115  1.0
  O  O23  1  0.106  0.648  0.017  1.0
[/CIF]
.