The compound described by SrHg2(OCl)2 crystallizes in the monoclinic P2_1/c space group. Sr(1) is bonded in a 8-coordinate geometry to one O(2), two equivalent O(1), two equivalent Cl(1), and three equivalent Cl(2) atoms. There are two inequivalent Hg sites. In the first Hg site, Hg(1) is bonded in a 3-coordinate geometry to one O(1) and two equivalent O(2) atoms. In the second Hg site, Hg(2) is bonded in a linear geometry to one O(1), one O(2), one Cl(1), and one Cl(2) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1), one Hg(1), and one Hg(2) atom to form OSr2Hg2 tetrahedra that share corners with two equivalent O(1)Sr2Hg2 tetrahedra and corners with five equivalent O(2)SrHg3 tetrahedra. In the second O site, O(2) is bonded to one Sr(1), one Hg(2), and two equivalent Hg(1) atoms to form distorted OSrHg3 tetrahedra that share corners with five equivalent O(1)Sr2Hg2 tetrahedra and  an edgeedge with one O(2)SrHg3 tetrahedra. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a 3-coordinate geometry to two equivalent Sr(1) and one Hg(2) atom. In the second Cl site, Cl(2) is bonded in a 4-coordinate geometry to three equivalent Sr(1) and one Hg(2) atom. is represented by the CIF card [CIF]
data_SrHg2(ClO)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.164
_cell_length_b   8.454
_cell_length_c   11.785
_cell_angle_alpha   57.906
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   604.702
_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
  Sr  Sr0  1  0.376  0.651  0.625  1.0
  Sr  Sr1  1  0.624  0.349  0.375  1.0
  Sr  Sr2  1  0.124  0.651  0.125  1.0
  Sr  Sr3  1  0.876  0.349  0.875  1.0
  Hg  Hg4  1  0.670  0.895  0.132  1.0
  Hg  Hg5  1  0.937  0.735  0.393  1.0
  Hg  Hg6  1  0.437  0.265  0.107  1.0
  Hg  Hg7  1  0.830  0.895  0.632  1.0
  Hg  Hg8  1  0.330  0.105  0.868  1.0
  Hg  Hg9  1  0.170  0.105  0.368  1.0
  Hg  Hg10  1  0.063  0.265  0.607  1.0
  Hg  Hg11  1  0.563  0.735  0.893  1.0
  Cl  Cl12  1  0.600  0.955  0.388  1.0
  Cl  Cl13  1  0.181  0.588  0.873  1.0
  Cl  Cl14  1  0.400  0.045  0.612  1.0
  Cl  Cl15  1  0.100  0.045  0.112  1.0
  Cl  Cl16  1  0.900  0.955  0.888  1.0
  Cl  Cl17  1  0.681  0.412  0.627  1.0
  Cl  Cl18  1  0.819  0.412  0.127  1.0
  Cl  Cl19  1  0.319  0.588  0.373  1.0
  O  O20  1  0.318  0.349  0.230  1.0
  O  O21  1  0.079  0.827  0.503  1.0
  O  O22  1  0.182  0.349  0.730  1.0
  O  O23  1  0.921  0.173  0.497  1.0
  O  O24  1  0.818  0.651  0.270  1.0
  O  O25  1  0.421  0.827  0.003  1.0
  O  O26  1  0.682  0.651  0.770  1.0
  O  O27  1  0.579  0.173  0.997  1.0
[/CIF]
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The compound described by SrHg2(OCl)2 crystallizes in the monoclinic P2_1/c space group. Sr(1) is bonded in a 8-coordinate geometry to one O(2), two equivalent O(1), two equivalent Cl(1), and three equivalent Cl(2) atoms. There are two inequivalent Hg sites. In the first Hg site, Hg(1) is bonded in a 3-coordinate geometry to one O(1) and two equivalent O(2) atoms. In the second Hg site, Hg(2) is bonded in a linear geometry to one O(1), one O(2), one Cl(1), and one Cl(2) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1), one Hg(1), and one Hg(2) atom to form OSr2Hg2 tetrahedra that share corners with two equivalent O(1)Sr2Hg2 tetrahedra and corners with five equivalent O(2)SrHg3 tetrahedra. In the second O site, O(2) is bonded to one Sr(1), one Hg(2), and two equivalent Hg(1) atoms to form distorted OSrHg3 tetrahedra that share corners with five equivalent O(1)Sr2Hg2 tetrahedra and  an edgeedge with one O(2)SrHg3 tetrahedra. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a 3-coordinate geometry to two equivalent Sr(1) and one Hg(2) atom. In the second Cl site, Cl(2) is bonded in a 4-coordinate geometry to three equivalent Sr(1) and one Hg(2) atom. is represented by the CIF card [CIF]
data_SrHg2(ClO)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.164
_cell_length_b   8.454
_cell_length_c   11.785
_cell_angle_alpha   57.906
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   604.702
_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
  Sr  Sr0  1  0.376  0.651  0.625  1.0
  Sr  Sr1  1  0.624  0.349  0.375  1.0
  Sr  Sr2  1  0.124  0.651  0.125  1.0
  Sr  Sr3  1  0.876  0.349  0.875  1.0
  Hg  Hg4  1  0.670  0.895  0.132  1.0
  Hg  Hg5  1  0.937  0.735  0.393  1.0
  Hg  Hg6  1  0.437  0.265  0.107  1.0
  Hg  Hg7  1  0.830  0.895  0.632  1.0
  Hg  Hg8  1  0.330  0.105  0.868  1.0
  Hg  Hg9  1  0.170  0.105  0.368  1.0
  Hg  Hg10  1  0.063  0.265  0.607  1.0
  Hg  Hg11  1  0.563  0.735  0.893  1.0
  Cl  Cl12  1  0.600  0.955  0.388  1.0
  Cl  Cl13  1  0.181  0.588  0.873  1.0
  Cl  Cl14  1  0.400  0.045  0.612  1.0
  Cl  Cl15  1  0.100  0.045  0.112  1.0
  Cl  Cl16  1  0.900  0.955  0.888  1.0
  Cl  Cl17  1  0.681  0.412  0.627  1.0
  Cl  Cl18  1  0.819  0.412  0.127  1.0
  Cl  Cl19  1  0.319  0.588  0.373  1.0
  O  O20  1  0.318  0.349  0.230  1.0
  O  O21  1  0.079  0.827  0.503  1.0
  O  O22  1  0.182  0.349  0.730  1.0
  O  O23  1  0.921  0.173  0.497  1.0
  O  O24  1  0.818  0.651  0.270  1.0
  O  O25  1  0.421  0.827  0.003  1.0
  O  O26  1  0.682  0.651  0.770  1.0
  O  O27  1  0.579  0.173  0.997  1.0
[/CIF]
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