data_K2SrGe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.0
_cell_length_b   7.0
_cell_length_c   7.0
_cell_angle_alpha   137.99
_cell_angle_beta   137.99
_cell_angle_gamma   60.92
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2SrGe
_chemical_formula_sum   'K2 Sr1 Ge1'
_cell_volume   151.78
_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
  K  K1  1  0.51  0.0  0.02  1.0
  K  K2  1  0.0  0.51  0.02  1.0
  Sr  Sr3  1  0.0  0.0  0.03  1.0
  Ge  Ge0  1  0.0  0.0  0.0  1.0

data_K2SrGe
_symmetry_space_group_name_H-M   Cm
_cell_length_a   7.09
_cell_length_b   7.09
_cell_length_c   7.0
_cell_angle_alpha   90.0
_cell_angle_beta   120.46
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   K2SrGe
_chemical_formula_sum   'K4 Sr2 Ge2'
_cell_volume   303.57
_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
  K  K0  4  0.25  0.75  0.51  1.0
  Sr  Sr1  2  0.0  0.0  0.03  1.0
  Ge  Ge2  2  0.0  0.0  0.0  1.0

K K Sr Ge
K K Sr Ge 0 1 o - - 0 1 o o o 0 1 + - o 0 1 + o + 0 3 o o o 0 3 + o o 0 2 o o o 0 2 + o o 1 3 o + o 1 3 o o o 1 2 o + o 1 2 o o o 2 3 o o o 
K2SrGe crystallizes in the monoclinic Cm space group. K(1) is bonded in a 6-coordinate geometry to four equivalent K(1), one Sr(1), and one Ge(1) atom. There are a spread of K(1)-K(1) bond distances ranging from 3.49-3.61 Å. The K(1)-Sr(1) bond length is 3.36 Å. The K(1)-Ge(1) bond length is 3.48 Å. Sr(1) is bonded in a single-bond geometry to two equivalent K(1) and one Ge(1) atom. The Sr(1)-Ge(1) bond length is 0.22 Å. Ge(1) is bonded in a single-bond geometry to two equivalent K(1) and one Sr(1) atom.