The compound described by Eu2Cu(GeO4)2 crystallizes in the monoclinic Cm space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(5), one O(6), and one O(8) atom. In the second Eu site, Eu(2) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(2), one O(4), one O(5), one O(7), one O(8), and one O(9) atom. Cu(1) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(10), one O(2), one O(4), and one O(8) atom. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a tetrahedral geometry to one O(6), one O(9), and two equivalent O(2) atoms. In the second Ge site, Ge(2) is bonded to one O(1), one O(10), one O(4), one O(5), and one O(8) atom to form corner-sharing GeO5 trigonal bipyramids. In the third Ge site, Ge(3) is bonded to one O(3), one O(7), and two equivalent O(5) atoms to form corner-sharing GeO4 tetrahedra. There are ten inequivalent O sites. In the first O site, O(9) is bonded in a distorted trigonal planar geometry to two equivalent Eu(2) and one Ge(1) atom. In the second O site, O(10) is bonded to one Eu(1), one Eu(2), one Cu(1), and one Ge(2) atom to form a mixture of distorted corner and edge-sharing OEu2CuGe trigonal pyramids. In the third O site, O(1) is bonded in a 4-coordinate geometry to one Eu(1), one Eu(2), one Cu(1), and one Ge(2) atom. In the fourth O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Eu(1), one Eu(2), one Cu(1), and one Ge(1) atom. In the fifth O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Eu(1) and one Ge(3) atom. In the sixth O site, O(4) is bonded to one Eu(1), one Eu(2), one Cu(1), and one Ge(2) atom to form a mixture of distorted corner and edge-sharing OEu2CuGe tetrahedra. In the seventh O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Eu(1), one Eu(2), one Ge(2), and one Ge(3) atom. In the eighth O site, O(6) is bonded in a distorted trigonal planar geometry to two equivalent Eu(1) and one Ge(1) atom. In the ninth O site, O(7) is bonded in a distorted trigonal planar geometry to two equivalent Eu(2) and one Ge(3) atom. In the tenth O site, O(8) is bonded to one Eu(1), one Eu(2), one Cu(1), and one Ge(2) atom to form a mixture of distorted corner and edge-sharing OEu2CuGe tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Eu2Cu(GeO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.159
_cell_length_b   9.159
_cell_length_c   5.225
_cell_angle_alpha   74.420
_cell_angle_beta   74.420
_cell_angle_gamma   112.867
_symmetry_Int_Tables_number   1
_cell_volume   352.948
_cell_formula_units_Z   2
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
  Eu  Eu0  1  0.458  0.699  0.193  1.0
  Eu  Eu1  1  0.699  0.458  0.193  1.0
  Eu  Eu2  1  0.200  0.959  0.676  1.0
  Eu  Eu3  1  0.959  0.200  0.676  1.0
  Cu  Cu4  1  0.664  0.078  0.362  1.0
  Cu  Cu5  1  0.078  0.664  0.362  1.0
  Ge  Ge6  1  0.843  0.843  0.353  1.0
  Ge  Ge7  1  0.528  0.106  0.919  1.0
  Ge  Ge8  1  0.106  0.528  0.919  1.0
  Ge  Ge9  1  0.333  0.333  0.988  1.0
  O  O10  1  0.376  0.907  0.935  1.0
  O  O11  1  0.907  0.376  0.935  1.0
  O  O12  1  0.756  0.948  0.550  1.0
  O  O13  1  0.948  0.756  0.550  1.0
  O  O14  1  0.500  0.500  0.019  1.0
  O  O15  1  0.717  0.226  0.564  1.0
  O  O16  1  0.226  0.717  0.564  1.0
  O  O17  1  0.428  0.241  0.773  1.0
  O  O18  1  0.241  0.428  0.773  1.0
  O  O19  1  0.672  0.672  0.336  1.0
  O  O20  1  0.176  0.176  0.344  1.0
  O  O21  1  0.516  0.157  0.242  1.0
  O  O22  1  0.157  0.516  0.242  1.0
  O  O23  1  0.998  0.998  0.992  1.0
  O  O24  1  0.655  0.996  0.079  1.0
  O  O25  1  0.996  0.655  0.079  1.0
[/CIF]
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The compound described by Eu2Cu(GeO4)2 crystallizes in the monoclinic Cm space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(5), one O(6), and one O(8) atom. In the second Eu site, Eu(2) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(2), one O(4), one O(5), one O(7), one O(8), and one O(9) atom. Cu(1) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(10), one O(2), one O(4), and one O(8) atom. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a tetrahedral geometry to one O(6), one O(9), and two equivalent O(2) atoms. In the second Ge site, Ge(2) is bonded to one O(1), one O(10), one O(4), one O(5), and one O(8) atom to form corner-sharing GeO5 trigonal bipyramids. In the third Ge site, Ge(3) is bonded to one O(3), one O(7), and two equivalent O(5) atoms to form corner-sharing GeO4 tetrahedra. There are ten inequivalent O sites. In the first O site, O(9) is bonded in a distorted trigonal planar geometry to two equivalent Eu(2) and one Ge(1) atom. In the second O site, O(10) is bonded to one Eu(1), one Eu(2), one Cu(1), and one Ge(2) atom to form a mixture of distorted corner and edge-sharing OEu2CuGe trigonal pyramids. In the third O site, O(1) is bonded in a 4-coordinate geometry to one Eu(1), one Eu(2), one Cu(1), and one Ge(2) atom. In the fourth O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Eu(1), one Eu(2), one Cu(1), and one Ge(1) atom. In the fifth O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Eu(1) and one Ge(3) atom. In the sixth O site, O(4) is bonded to one Eu(1), one Eu(2), one Cu(1), and one Ge(2) atom to form a mixture of distorted corner and edge-sharing OEu2CuGe tetrahedra. In the seventh O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Eu(1), one Eu(2), one Ge(2), and one Ge(3) atom. In the eighth O site, O(6) is bonded in a distorted trigonal planar geometry to two equivalent Eu(1) and one Ge(1) atom. In the ninth O site, O(7) is bonded in a distorted trigonal planar geometry to two equivalent Eu(2) and one Ge(3) atom. In the tenth O site, O(8) is bonded to one Eu(1), one Eu(2), one Cu(1), and one Ge(2) atom to form a mixture of distorted corner and edge-sharing OEu2CuGe tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Eu2Cu(GeO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.159
_cell_length_b   9.159
_cell_length_c   5.225
_cell_angle_alpha   74.420
_cell_angle_beta   74.420
_cell_angle_gamma   112.867
_symmetry_Int_Tables_number   1
_cell_volume   352.948
_cell_formula_units_Z   2
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
  Eu  Eu0  1  0.458  0.699  0.193  1.0
  Eu  Eu1  1  0.699  0.458  0.193  1.0
  Eu  Eu2  1  0.200  0.959  0.676  1.0
  Eu  Eu3  1  0.959  0.200  0.676  1.0
  Cu  Cu4  1  0.664  0.078  0.362  1.0
  Cu  Cu5  1  0.078  0.664  0.362  1.0
  Ge  Ge6  1  0.843  0.843  0.353  1.0
  Ge  Ge7  1  0.528  0.106  0.919  1.0
  Ge  Ge8  1  0.106  0.528  0.919  1.0
  Ge  Ge9  1  0.333  0.333  0.988  1.0
  O  O10  1  0.376  0.907  0.935  1.0
  O  O11  1  0.907  0.376  0.935  1.0
  O  O12  1  0.756  0.948  0.550  1.0
  O  O13  1  0.948  0.756  0.550  1.0
  O  O14  1  0.500  0.500  0.019  1.0
  O  O15  1  0.717  0.226  0.564  1.0
  O  O16  1  0.226  0.717  0.564  1.0
  O  O17  1  0.428  0.241  0.773  1.0
  O  O18  1  0.241  0.428  0.773  1.0
  O  O19  1  0.672  0.672  0.336  1.0
  O  O20  1  0.176  0.176  0.344  1.0
  O  O21  1  0.516  0.157  0.242  1.0
  O  O22  1  0.157  0.516  0.242  1.0
  O  O23  1  0.998  0.998  0.992  1.0
  O  O24  1  0.655  0.996  0.079  1.0
  O  O25  1  0.996  0.655  0.079  1.0
[/CIF]
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