The crystal structure described by MgYb2Cu(GeO3)4 crystallizes in the triclinic P-1 space group. Mg(1) is bonded to two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms to form MgO6 octahedra that share edges with two equivalent Ge(1)O4 tetrahedra and edges with two equivalent Ge(2)O4 tetrahedra. Yb(1) is bonded in a 7-coordinate geometry to one O(3), one O(5), one O(6), two equivalent O(1), and two equivalent O(2) atoms. Cu(1) is bonded in a square co-planar geometry to two equivalent O(5) and two equivalent O(6) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(1), one O(3), one O(4), and one O(6) atom to form GeO4 tetrahedra that share corners with two equivalent Ge(2)O4 tetrahedra and  an edgeedge with one Mg(1)O6 octahedra. In the second Ge site, Ge(2) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form GeO4 tetrahedra that share corners with two equivalent Ge(1)O4 tetrahedra and  an edgeedge with one Mg(1)O6 octahedra. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Yb(1) and one Ge(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Yb(1) and one Ge(2) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Yb(1), one Ge(1), and one Ge(2) atom. In the fourth O site, O(4) is bonded in a distorted T-shaped geometry to one Mg(1), one Ge(1), and one Ge(2) atom. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Yb(1), one Cu(1), and one Ge(2) atom. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Yb(1), one Cu(1), and one Ge(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Yb2MgCu(GeO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.159
_cell_length_b   7.588
_cell_length_c   8.151
_cell_angle_alpha   64.408
_cell_angle_beta   84.831
_cell_angle_gamma   74.934
_symmetry_Int_Tables_number   1
_cell_volume   277.815
_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
  Yb  Yb0  1  0.031  0.775  0.442  1.0
  Yb  Yb1  1  0.969  0.225  0.558  1.0
  Mg  Mg2  1  0.500  1.000  0.000  1.0
  Cu  Cu3  1  0.000  0.000  0.000  1.0
  Ge  Ge4  1  0.548  0.829  0.762  1.0
  Ge  Ge5  1  0.452  0.171  0.238  1.0
  Ge  Ge6  1  0.586  0.600  0.217  1.0
  Ge  Ge7  1  0.414  0.400  0.783  1.0
  O  O8  1  0.770  0.935  0.604  1.0
  O  O9  1  0.230  0.065  0.396  1.0
  O  O10  1  0.796  0.565  0.385  1.0
  O  O11  1  0.204  0.435  0.615  1.0
  O  O12  1  0.426  0.649  0.729  1.0
  O  O13  1  0.574  0.351  0.271  1.0
  O  O14  1  0.717  0.726  0.989  1.0
  O  O15  1  0.715  0.200  0.814  1.0
  O  O16  1  0.285  0.800  0.186  1.0
  O  O17  1  0.732  0.997  0.195  1.0
  O  O18  1  0.268  0.003  0.805  1.0
  O  O19  1  0.283  0.274  0.011  1.0
[/CIF]
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The crystal structure described by MgYb2Cu(GeO3)4 crystallizes in the triclinic P-1 space group. Mg(1) is bonded to two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms to form MgO6 octahedra that share edges with two equivalent Ge(1)O4 tetrahedra and edges with two equivalent Ge(2)O4 tetrahedra. Yb(1) is bonded in a 7-coordinate geometry to one O(3), one O(5), one O(6), two equivalent O(1), and two equivalent O(2) atoms. Cu(1) is bonded in a square co-planar geometry to two equivalent O(5) and two equivalent O(6) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(1), one O(3), one O(4), and one O(6) atom to form GeO4 tetrahedra that share corners with two equivalent Ge(2)O4 tetrahedra and  an edgeedge with one Mg(1)O6 octahedra. In the second Ge site, Ge(2) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form GeO4 tetrahedra that share corners with two equivalent Ge(1)O4 tetrahedra and  an edgeedge with one Mg(1)O6 octahedra. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Yb(1) and one Ge(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Yb(1) and one Ge(2) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Yb(1), one Ge(1), and one Ge(2) atom. In the fourth O site, O(4) is bonded in a distorted T-shaped geometry to one Mg(1), one Ge(1), and one Ge(2) atom. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Yb(1), one Cu(1), and one Ge(2) atom. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Yb(1), one Cu(1), and one Ge(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Yb2MgCu(GeO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.159
_cell_length_b   7.588
_cell_length_c   8.151
_cell_angle_alpha   64.408
_cell_angle_beta   84.831
_cell_angle_gamma   74.934
_symmetry_Int_Tables_number   1
_cell_volume   277.815
_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
  Yb  Yb0  1  0.031  0.775  0.442  1.0
  Yb  Yb1  1  0.969  0.225  0.558  1.0
  Mg  Mg2  1  0.500  1.000  0.000  1.0
  Cu  Cu3  1  0.000  0.000  0.000  1.0
  Ge  Ge4  1  0.548  0.829  0.762  1.0
  Ge  Ge5  1  0.452  0.171  0.238  1.0
  Ge  Ge6  1  0.586  0.600  0.217  1.0
  Ge  Ge7  1  0.414  0.400  0.783  1.0
  O  O8  1  0.770  0.935  0.604  1.0
  O  O9  1  0.230  0.065  0.396  1.0
  O  O10  1  0.796  0.565  0.385  1.0
  O  O11  1  0.204  0.435  0.615  1.0
  O  O12  1  0.426  0.649  0.729  1.0
  O  O13  1  0.574  0.351  0.271  1.0
  O  O14  1  0.717  0.726  0.989  1.0
  O  O15  1  0.715  0.200  0.814  1.0
  O  O16  1  0.285  0.800  0.186  1.0
  O  O17  1  0.732  0.997  0.195  1.0
  O  O18  1  0.268  0.003  0.805  1.0
  O  O19  1  0.283  0.274  0.011  1.0
[/CIF]
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