The structure described by Sr(OH)2 crystallizes in the orthorhombic Pmc2_1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one H(1), one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to one H(2), one O(2), one O(4), two equivalent O(1), and two equivalent O(3) atoms. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one Sr(1) and one O(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one Sr(2) and one O(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one O(3) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Sr(1), two equivalent Sr(2), and one H(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one Sr(2), two equivalent Sr(1), and one H(2) atom. In the third O site, O(3) is bonded in a single-bond geometry to one Sr(1), two equivalent Sr(2), and one H(3) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one Sr(2), two equivalent Sr(1), and one H(4) atom. is represented by the CIF card [CIF]
data_Sr(HO)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.997
_cell_length_b   6.078
_cell_length_c   10.072
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   244.677
_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  0.500  0.347  0.341  1.0
  Sr  Sr1  1  0.500  0.653  0.841  1.0
  Sr  Sr2  1  0.000  0.160  0.660  1.0
  Sr  Sr3  1  0.000  0.840  0.160  1.0
  H  H4  1  0.500  0.426  0.091  1.0
  H  H5  1  0.500  0.574  0.591  1.0
  H  H6  1  0.000  0.064  0.908  1.0
  H  H7  1  0.000  0.936  0.408  1.0
  H  H8  1  0.500  0.089  0.039  1.0
  H  H9  1  0.500  0.911  0.539  1.0
  H  H10  1  0.000  0.374  0.967  1.0
  H  H11  1  0.000  0.626  0.467  1.0
  O  O12  1  0.500  0.586  0.105  1.0
  O  O13  1  0.500  0.414  0.605  1.0
  O  O14  1  0.000  0.903  0.901  1.0
  O  O15  1  0.000  0.097  0.401  1.0
  O  O16  1  0.500  0.105  0.135  1.0
  O  O17  1  0.500  0.895  0.635  1.0
  O  O18  1  0.000  0.383  0.869  1.0
  O  O19  1  0.000  0.617  0.369  1.0
[/CIF]
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The structure described by Sr(OH)2 crystallizes in the orthorhombic Pmc2_1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one H(1), one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to one H(2), one O(2), one O(4), two equivalent O(1), and two equivalent O(3) atoms. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one Sr(1) and one O(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one Sr(2) and one O(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one O(3) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Sr(1), two equivalent Sr(2), and one H(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one Sr(2), two equivalent Sr(1), and one H(2) atom. In the third O site, O(3) is bonded in a single-bond geometry to one Sr(1), two equivalent Sr(2), and one H(3) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one Sr(2), two equivalent Sr(1), and one H(4) atom. is represented by the CIF card [CIF]
data_Sr(HO)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.997
_cell_length_b   6.078
_cell_length_c   10.072
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   244.677
_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  0.500  0.347  0.341  1.0
  Sr  Sr1  1  0.500  0.653  0.841  1.0
  Sr  Sr2  1  0.000  0.160  0.660  1.0
  Sr  Sr3  1  0.000  0.840  0.160  1.0
  H  H4  1  0.500  0.426  0.091  1.0
  H  H5  1  0.500  0.574  0.591  1.0
  H  H6  1  0.000  0.064  0.908  1.0
  H  H7  1  0.000  0.936  0.408  1.0
  H  H8  1  0.500  0.089  0.039  1.0
  H  H9  1  0.500  0.911  0.539  1.0
  H  H10  1  0.000  0.374  0.967  1.0
  H  H11  1  0.000  0.626  0.467  1.0
  O  O12  1  0.500  0.586  0.105  1.0
  O  O13  1  0.500  0.414  0.605  1.0
  O  O14  1  0.000  0.903  0.901  1.0
  O  O15  1  0.000  0.097  0.401  1.0
  O  O16  1  0.500  0.105  0.135  1.0
  O  O17  1  0.500  0.895  0.635  1.0
  O  O18  1  0.000  0.383  0.869  1.0
  O  O19  1  0.000  0.617  0.369  1.0
[/CIF]
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