The material described by LaMnCuGe2 crystallizes in the tetragonal I-4m2 space group. La(1) is bonded in a 16-coordinate geometry to four equivalent Mn(1), four equivalent Cu(1), and eight equivalent Ge(1) atoms. Mn(1) is bonded to four equivalent La(1), four equivalent Cu(1), and four equivalent Ge(1) atoms to form distorted MnLa4Cu4Ge4 tetrahedra that share corners with four equivalent Cu(1)La4Mn4Ge4 cuboctahedra, corners with twelve equivalent Mn(1)La4Cu4Ge4 tetrahedra, edges with two equivalent Cu(1)La4Mn4Ge4 cuboctahedra, faces with four equivalent Cu(1)La4Mn4Ge4 cuboctahedra, and faces with four equivalent Mn(1)La4Cu4Ge4 tetrahedra. Cu(1) is bonded to four equivalent La(1), four equivalent Mn(1), and four equivalent Ge(1) atoms to form distorted CuLa4Mn4Ge4 cuboctahedra that share corners with twelve equivalent Cu(1)La4Mn4Ge4 cuboctahedra, corners with four equivalent Mn(1)La4Cu4Ge4 tetrahedra, edges with two equivalent Mn(1)La4Cu4Ge4 tetrahedra, faces with four equivalent Cu(1)La4Mn4Ge4 cuboctahedra, and faces with four equivalent Mn(1)La4Cu4Ge4 tetrahedra. Ge(1) is bonded in a 9-coordinate geometry to four equivalent La(1), two equivalent Mn(1), two equivalent Cu(1), and one Ge(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_LaMnCuGe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.091
_cell_length_b   6.091
_cell_length_c   6.091
_cell_angle_alpha   139.476
_cell_angle_beta   139.476
_cell_angle_gamma   58.650
_symmetry_Int_Tables_number   1
_cell_volume   94.502
_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
  La  La0  1  0.000  0.000  0.000  1.0
  Mn  Mn1  1  0.250  0.750  0.500  1.0
  Cu  Cu2  1  0.750  0.250  0.500  1.0
  Ge  Ge3  1  0.623  0.623  0.000  1.0
  Ge  Ge4  1  0.377  0.377  0.000  1.0
[/CIF]
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The material described by LaMnCuGe2 crystallizes in the tetragonal I-4m2 space group. La(1) is bonded in a 16-coordinate geometry to four equivalent Mn(1), four equivalent Cu(1), and eight equivalent Ge(1) atoms. Mn(1) is bonded to four equivalent La(1), four equivalent Cu(1), and four equivalent Ge(1) atoms to form distorted MnLa4Cu4Ge4 tetrahedra that share corners with four equivalent Cu(1)La4Mn4Ge4 cuboctahedra, corners with twelve equivalent Mn(1)La4Cu4Ge4 tetrahedra, edges with two equivalent Cu(1)La4Mn4Ge4 cuboctahedra, faces with four equivalent Cu(1)La4Mn4Ge4 cuboctahedra, and faces with four equivalent Mn(1)La4Cu4Ge4 tetrahedra. Cu(1) is bonded to four equivalent La(1), four equivalent Mn(1), and four equivalent Ge(1) atoms to form distorted CuLa4Mn4Ge4 cuboctahedra that share corners with twelve equivalent Cu(1)La4Mn4Ge4 cuboctahedra, corners with four equivalent Mn(1)La4Cu4Ge4 tetrahedra, edges with two equivalent Mn(1)La4Cu4Ge4 tetrahedra, faces with four equivalent Cu(1)La4Mn4Ge4 cuboctahedra, and faces with four equivalent Mn(1)La4Cu4Ge4 tetrahedra. Ge(1) is bonded in a 9-coordinate geometry to four equivalent La(1), two equivalent Mn(1), two equivalent Cu(1), and one Ge(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_LaMnCuGe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.091
_cell_length_b   6.091
_cell_length_c   6.091
_cell_angle_alpha   139.476
_cell_angle_beta   139.476
_cell_angle_gamma   58.650
_symmetry_Int_Tables_number   1
_cell_volume   94.502
_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
  La  La0  1  0.000  0.000  0.000  1.0
  Mn  Mn1  1  0.250  0.750  0.500  1.0
  Cu  Cu2  1  0.750  0.250  0.500  1.0
  Ge  Ge3  1  0.623  0.623  0.000  1.0
  Ge  Ge4  1  0.377  0.377  0.000  1.0
[/CIF]
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