data_SrMgZn2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.61
_cell_length_b   3.61
_cell_length_c   7.3
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrMgZn2
_chemical_formula_sum   'Sr1 Mg1 Zn2'
_cell_volume   95.34
_cell_formula_units_Z   1
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  Sr1  1  0.0  0.0  0.65  1.0
  Mg  Mg0  1  0.0  0.0  0.0  1.0
  Zn  Zn2  1  0.81  0.81  0.85  1.0
  Zn  Zn3  1  0.81  0.81  0.46  1.0

data_SrMgZn2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.11
_cell_length_b   5.11
_cell_length_c   7.3
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SrMgZn2
_chemical_formula_sum   'Sr2 Mg2 Zn4'
_cell_volume   190.68
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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  2  0.0  0.0  0.65  1.0
  Mg  Mg1  2  0.0  0.0  0.0  1.0
  Zn  Zn2  2  0.31  0.5  0.46  1.0
  Zn  Zn3  2  0.31  0.5  0.85  1.0

Sr Mg Zn Zn
SrMgZn2 crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two SrMgZn2 clusters. Sr(1) is bonded in a water-like geometry to one Zn(1) and one Zn(2) atom. The Sr(1)-Zn(1) bond length is 1.74 Å. The Sr(1)-Zn(2) bond length is 1.74 Å. Mg(1) is bonded in a single-bond geometry to one Zn(1) atom. The Mg(1)-Zn(1) bond length is 1.49 Å. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a water-like geometry to one Sr(1) and one Mg(1) atom. In the second Zn site, Zn(2) is bonded in a single-bond geometry to one Sr(1) atom.