The material structure described by Sr2Ge is Cotunnite structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to four equivalent Ge(1) atoms to form a mixture of corner and edge-sharing SrGe4 tetrahedra. In the second Sr site, Sr(2) is bonded in a 3-coordinate geometry to three equivalent Ge(1) atoms. Ge(1) is bonded in a 7-coordinate geometry to three equivalent Sr(2) and four equivalent Sr(1) atoms. is represented by the CIF card [CIF]
data_Sr2Ge
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.182
_cell_length_b   8.139
_cell_length_c   9.585
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   404.308
_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  0.348  0.920  1.0
  Sr  Sr1  1  0.250  0.652  0.080  1.0
  Sr  Sr2  1  0.750  0.848  0.580  1.0
  Sr  Sr3  1  0.250  0.152  0.420  1.0
  Sr  Sr4  1  0.250  0.016  0.826  1.0
  Sr  Sr5  1  0.750  0.984  0.174  1.0
  Sr  Sr6  1  0.250  0.516  0.674  1.0
  Sr  Sr7  1  0.750  0.484  0.326  1.0
  Ge  Ge8  1  0.250  0.753  0.401  1.0
  Ge  Ge9  1  0.750  0.247  0.599  1.0
  Ge  Ge10  1  0.250  0.253  0.099  1.0
  Ge  Ge11  1  0.750  0.747  0.901  1.0
[/CIF]
.
The material structure described by Sr2Ge is Cotunnite structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to four equivalent Ge(1) atoms to form a mixture of corner and edge-sharing SrGe4 tetrahedra. In the second Sr site, Sr(2) is bonded in a 3-coordinate geometry to three equivalent Ge(1) atoms. Ge(1) is bonded in a 7-coordinate geometry to three equivalent Sr(2) and four equivalent Sr(1) atoms. is represented by the CIF card [CIF]
data_Sr2Ge
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.182
_cell_length_b   8.139
_cell_length_c   9.585
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   404.308
_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  0.348  0.920  1.0
  Sr  Sr1  1  0.250  0.652  0.080  1.0
  Sr  Sr2  1  0.750  0.848  0.580  1.0
  Sr  Sr3  1  0.250  0.152  0.420  1.0
  Sr  Sr4  1  0.250  0.016  0.826  1.0
  Sr  Sr5  1  0.750  0.984  0.174  1.0
  Sr  Sr6  1  0.250  0.516  0.674  1.0
  Sr  Sr7  1  0.750  0.484  0.326  1.0
  Ge  Ge8  1  0.250  0.753  0.401  1.0
  Ge  Ge9  1  0.750  0.247  0.599  1.0
  Ge  Ge10  1  0.250  0.253  0.099  1.0
  Ge  Ge11  1  0.750  0.747  0.901  1.0
[/CIF]
.