The structure described by Sr(NH2)2 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four sr (n h2)2 molecules. Sr(1) is bonded in a 2-coordinate geometry to one N(1) and one N(2) atom. There are two inequivalent N sites. In the first N site, N(1) is bonded in a distorted water-like geometry to one Sr(1), one H(1), and one H(2) atom. In the second N site, N(2) is bonded in a distorted water-like geometry to one Sr(1), one H(3), and one H(4) atom. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one N(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one N(1) atom. In the third H site, H(3) is bonded in a single-bond geometry to one N(2) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one N(2) atom. is represented by the CIF file [CIF]
data_Sr(H2N)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.748
_cell_length_b   6.649
_cell_length_c   6.722
_cell_angle_alpha   70.175
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   325.743
_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  0.377  0.999  0.750  1.0
  Sr  Sr1  1  0.877  0.501  0.250  1.0
  Sr  Sr2  1  0.623  0.001  0.250  1.0
  Sr  Sr3  1  0.123  0.499  0.750  1.0
  H  H4  1  0.034  0.880  0.936  1.0
  H  H5  1  0.534  0.620  0.064  1.0
  H  H6  1  0.966  0.120  0.064  1.0
  H  H7  1  0.466  0.380  0.936  1.0
  H  H8  1  0.178  0.759  0.107  1.0
  H  H9  1  0.678  0.741  0.893  1.0
  H  H10  1  0.822  0.241  0.893  1.0
  H  H11  1  0.322  0.259  0.107  1.0
  H  H12  1  0.226  0.328  0.374  1.0
  H  H13  1  0.726  0.172  0.626  1.0
  H  H14  1  0.774  0.672  0.626  1.0
  H  H15  1  0.274  0.828  0.374  1.0
  H  H16  1  0.088  0.141  0.475  1.0
  H  H17  1  0.588  0.359  0.525  1.0
  H  H18  1  0.912  0.859  0.525  1.0
  H  H19  1  0.412  0.641  0.475  1.0
  N  N20  1  0.115  0.750  0.976  1.0
  N  N21  1  0.615  0.750  0.024  1.0
  N  N22  1  0.885  0.250  0.024  1.0
  N  N23  1  0.385  0.250  0.976  1.0
  N  N24  1  0.140  0.274  0.497  1.0
  N  N25  1  0.640  0.226  0.503  1.0
  N  N26  1  0.860  0.726  0.503  1.0
  N  N27  1  0.360  0.774  0.497  1.0
[/CIF]
.
The structure described by Sr(NH2)2 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four sr (n h2)2 molecules. Sr(1) is bonded in a 2-coordinate geometry to one N(1) and one N(2) atom. There are two inequivalent N sites. In the first N site, N(1) is bonded in a distorted water-like geometry to one Sr(1), one H(1), and one H(2) atom. In the second N site, N(2) is bonded in a distorted water-like geometry to one Sr(1), one H(3), and one H(4) atom. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one N(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one N(1) atom. In the third H site, H(3) is bonded in a single-bond geometry to one N(2) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one N(2) atom. is represented by the CIF file [CIF]
data_Sr(H2N)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.748
_cell_length_b   6.649
_cell_length_c   6.722
_cell_angle_alpha   70.175
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   325.743
_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  0.377  0.999  0.750  1.0
  Sr  Sr1  1  0.877  0.501  0.250  1.0
  Sr  Sr2  1  0.623  0.001  0.250  1.0
  Sr  Sr3  1  0.123  0.499  0.750  1.0
  H  H4  1  0.034  0.880  0.936  1.0
  H  H5  1  0.534  0.620  0.064  1.0
  H  H6  1  0.966  0.120  0.064  1.0
  H  H7  1  0.466  0.380  0.936  1.0
  H  H8  1  0.178  0.759  0.107  1.0
  H  H9  1  0.678  0.741  0.893  1.0
  H  H10  1  0.822  0.241  0.893  1.0
  H  H11  1  0.322  0.259  0.107  1.0
  H  H12  1  0.226  0.328  0.374  1.0
  H  H13  1  0.726  0.172  0.626  1.0
  H  H14  1  0.774  0.672  0.626  1.0
  H  H15  1  0.274  0.828  0.374  1.0
  H  H16  1  0.088  0.141  0.475  1.0
  H  H17  1  0.588  0.359  0.525  1.0
  H  H18  1  0.912  0.859  0.525  1.0
  H  H19  1  0.412  0.641  0.475  1.0
  N  N20  1  0.115  0.750  0.976  1.0
  N  N21  1  0.615  0.750  0.024  1.0
  N  N22  1  0.885  0.250  0.024  1.0
  N  N23  1  0.385  0.250  0.976  1.0
  N  N24  1  0.140  0.274  0.497  1.0
  N  N25  1  0.640  0.226  0.503  1.0
  N  N26  1  0.860  0.726  0.503  1.0
  N  N27  1  0.360  0.774  0.497  1.0
[/CIF]
.