The structure described by Sr(OH)2 crystallizes in the orthorhombic Pnma space group. Sr(1) is bonded in a 7-coordinate geometry to one H(2), three equivalent O(1), and three equivalent O(2) atoms. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one Sr(1) and one O(2) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to three equivalent Sr(1) and one H(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to three equivalent Sr(1) and one H(2) atom. is represented by the CIF card [CIF]
data_Sr(HO)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.913
_cell_length_b   6.011
_cell_length_c   9.838
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   231.390
_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  0.750  0.602  0.340  1.0
  Sr  Sr1  1  0.250  0.398  0.660  1.0
  Sr  Sr2  1  0.250  0.102  0.160  1.0
  Sr  Sr3  1  0.750  0.898  0.840  1.0
  H  H4  1  0.750  0.371  0.026  1.0
  H  H5  1  0.250  0.629  0.974  1.0
  H  H6  1  0.250  0.871  0.474  1.0
  H  H7  1  0.750  0.129  0.526  1.0
  H  H8  1  0.250  0.185  0.408  1.0
  H  H9  1  0.750  0.815  0.592  1.0
  H  H10  1  0.750  0.685  0.092  1.0
  H  H11  1  0.250  0.315  0.908  1.0
  O  O12  1  0.750  0.127  0.625  1.0
  O  O13  1  0.250  0.873  0.375  1.0
  O  O14  1  0.250  0.627  0.875  1.0
  O  O15  1  0.750  0.373  0.125  1.0
  O  O16  1  0.250  0.346  0.394  1.0
  O  O17  1  0.750  0.654  0.606  1.0
  O  O18  1  0.750  0.846  0.106  1.0
  O  O19  1  0.250  0.154  0.894  1.0
[/CIF]
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The structure described by Sr(OH)2 crystallizes in the orthorhombic Pnma space group. Sr(1) is bonded in a 7-coordinate geometry to one H(2), three equivalent O(1), and three equivalent O(2) atoms. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one Sr(1) and one O(2) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to three equivalent Sr(1) and one H(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to three equivalent Sr(1) and one H(2) atom. is represented by the CIF card [CIF]
data_Sr(HO)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.913
_cell_length_b   6.011
_cell_length_c   9.838
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   231.390
_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  0.750  0.602  0.340  1.0
  Sr  Sr1  1  0.250  0.398  0.660  1.0
  Sr  Sr2  1  0.250  0.102  0.160  1.0
  Sr  Sr3  1  0.750  0.898  0.840  1.0
  H  H4  1  0.750  0.371  0.026  1.0
  H  H5  1  0.250  0.629  0.974  1.0
  H  H6  1  0.250  0.871  0.474  1.0
  H  H7  1  0.750  0.129  0.526  1.0
  H  H8  1  0.250  0.185  0.408  1.0
  H  H9  1  0.750  0.815  0.592  1.0
  H  H10  1  0.750  0.685  0.092  1.0
  H  H11  1  0.250  0.315  0.908  1.0
  O  O12  1  0.750  0.127  0.625  1.0
  O  O13  1  0.250  0.873  0.375  1.0
  O  O14  1  0.250  0.627  0.875  1.0
  O  O15  1  0.750  0.373  0.125  1.0
  O  O16  1  0.250  0.346  0.394  1.0
  O  O17  1  0.750  0.654  0.606  1.0
  O  O18  1  0.750  0.846  0.106  1.0
  O  O19  1  0.250  0.154  0.894  1.0
[/CIF]
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