The crystal structure described by Hg3AsO5 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Hg sites. In the first Hg site, Hg(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), and two equivalent O(4) atoms. In the second Hg site, Hg(2) is bonded in a 6-coordinate geometry to one O(2), one O(3), two equivalent O(1), and two equivalent O(5) atoms. In the third Hg site, Hg(3) is bonded in a 4-coordinate geometry to one Hg(3), one O(1), one O(2), and one O(3) atom. As(1) is bonded in a tetrahedral geometry to one O(2), one O(3), one O(4), and one O(5) atom. There are five inequivalent O sites. In the first O site, O(5) is bonded in a 3-coordinate geometry to two equivalent Hg(2) and one As(1) atom. In the second O site, O(1) is bonded to one Hg(1), one Hg(3), and two equivalent Hg(2) atoms to form distorted edge-sharing OHg4 tetrahedra. In the third O site, O(2) is bonded in a distorted single-bond geometry to one Hg(1), one Hg(2), one Hg(3), and one As(1) atom. In the fourth O site, O(3) is bonded in a distorted single-bond geometry to one Hg(2), one Hg(3), and one As(1) atom. In the fifth O site, O(4) is bonded in a 2-coordinate geometry to two equivalent Hg(1) and one As(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Hg3AsO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.126
_cell_length_b   7.024
_cell_length_c   10.603
_cell_angle_alpha   57.782
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   575.056
_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
  Hg  Hg0  1  0.137  0.660  0.346  1.0
  Hg  Hg1  1  0.363  0.660  0.846  1.0
  Hg  Hg2  1  0.863  0.340  0.654  1.0
  Hg  Hg3  1  0.637  0.340  0.154  1.0
  Hg  Hg4  1  0.007  0.772  0.985  1.0
  Hg  Hg5  1  0.493  0.772  0.485  1.0
  Hg  Hg6  1  0.993  0.228  0.015  1.0
  Hg  Hg7  1  0.507  0.228  0.515  1.0
  Hg  Hg8  1  0.369  0.958  0.054  1.0
  Hg  Hg9  1  0.131  0.958  0.554  1.0
  Hg  Hg10  1  0.631  0.042  0.946  1.0
  Hg  Hg11  1  0.869  0.042  0.446  1.0
  As  As12  1  0.240  0.301  0.711  1.0
  As  As13  1  0.260  0.301  0.211  1.0
  As  As14  1  0.760  0.699  0.289  1.0
  As  As15  1  0.740  0.699  0.789  1.0
  O  O16  1  0.137  0.860  0.115  1.0
  O  O17  1  0.363  0.860  0.615  1.0
  O  O18  1  0.863  0.140  0.885  1.0
  O  O19  1  0.637  0.140  0.385  1.0
  O  O20  1  0.230  0.334  0.858  1.0
  O  O21  1  0.270  0.334  0.358  1.0
  O  O22  1  0.770  0.666  0.142  1.0
  O  O23  1  0.730  0.666  0.642  1.0
  O  O24  1  0.178  0.045  0.756  1.0
  O  O25  1  0.322  0.045  0.256  1.0
  O  O26  1  0.822  0.955  0.244  1.0
  O  O27  1  0.678  0.955  0.744  1.0
  O  O28  1  0.129  0.514  0.577  1.0
  O  O29  1  0.371  0.514  0.077  1.0
  O  O30  1  0.871  0.486  0.423  1.0
  O  O31  1  0.629  0.486  0.923  1.0
  O  O32  1  0.417  0.350  0.645  1.0
  O  O33  1  0.083  0.350  0.145  1.0
  O  O34  1  0.583  0.650  0.355  1.0
  O  O35  1  0.917  0.650  0.855  1.0
[/CIF]
.
The crystal structure described by Hg3AsO5 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Hg sites. In the first Hg site, Hg(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), and two equivalent O(4) atoms. In the second Hg site, Hg(2) is bonded in a 6-coordinate geometry to one O(2), one O(3), two equivalent O(1), and two equivalent O(5) atoms. In the third Hg site, Hg(3) is bonded in a 4-coordinate geometry to one Hg(3), one O(1), one O(2), and one O(3) atom. As(1) is bonded in a tetrahedral geometry to one O(2), one O(3), one O(4), and one O(5) atom. There are five inequivalent O sites. In the first O site, O(5) is bonded in a 3-coordinate geometry to two equivalent Hg(2) and one As(1) atom. In the second O site, O(1) is bonded to one Hg(1), one Hg(3), and two equivalent Hg(2) atoms to form distorted edge-sharing OHg4 tetrahedra. In the third O site, O(2) is bonded in a distorted single-bond geometry to one Hg(1), one Hg(2), one Hg(3), and one As(1) atom. In the fourth O site, O(3) is bonded in a distorted single-bond geometry to one Hg(2), one Hg(3), and one As(1) atom. In the fifth O site, O(4) is bonded in a 2-coordinate geometry to two equivalent Hg(1) and one As(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Hg3AsO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.126
_cell_length_b   7.024
_cell_length_c   10.603
_cell_angle_alpha   57.782
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   575.056
_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
  Hg  Hg0  1  0.137  0.660  0.346  1.0
  Hg  Hg1  1  0.363  0.660  0.846  1.0
  Hg  Hg2  1  0.863  0.340  0.654  1.0
  Hg  Hg3  1  0.637  0.340  0.154  1.0
  Hg  Hg4  1  0.007  0.772  0.985  1.0
  Hg  Hg5  1  0.493  0.772  0.485  1.0
  Hg  Hg6  1  0.993  0.228  0.015  1.0
  Hg  Hg7  1  0.507  0.228  0.515  1.0
  Hg  Hg8  1  0.369  0.958  0.054  1.0
  Hg  Hg9  1  0.131  0.958  0.554  1.0
  Hg  Hg10  1  0.631  0.042  0.946  1.0
  Hg  Hg11  1  0.869  0.042  0.446  1.0
  As  As12  1  0.240  0.301  0.711  1.0
  As  As13  1  0.260  0.301  0.211  1.0
  As  As14  1  0.760  0.699  0.289  1.0
  As  As15  1  0.740  0.699  0.789  1.0
  O  O16  1  0.137  0.860  0.115  1.0
  O  O17  1  0.363  0.860  0.615  1.0
  O  O18  1  0.863  0.140  0.885  1.0
  O  O19  1  0.637  0.140  0.385  1.0
  O  O20  1  0.230  0.334  0.858  1.0
  O  O21  1  0.270  0.334  0.358  1.0
  O  O22  1  0.770  0.666  0.142  1.0
  O  O23  1  0.730  0.666  0.642  1.0
  O  O24  1  0.178  0.045  0.756  1.0
  O  O25  1  0.322  0.045  0.256  1.0
  O  O26  1  0.822  0.955  0.244  1.0
  O  O27  1  0.678  0.955  0.744  1.0
  O  O28  1  0.129  0.514  0.577  1.0
  O  O29  1  0.371  0.514  0.077  1.0
  O  O30  1  0.871  0.486  0.423  1.0
  O  O31  1  0.629  0.486  0.923  1.0
  O  O32  1  0.417  0.350  0.645  1.0
  O  O33  1  0.083  0.350  0.145  1.0
  O  O34  1  0.583  0.650  0.355  1.0
  O  O35  1  0.917  0.650  0.855  1.0
[/CIF]
.