The crystal structure described by Be2Lu2GeO7 crystallizes in the tetragonal P-42_1m space group. Be(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form BeO4 tetrahedra that share  a cornercorner with one Be(1)O4 tetrahedra and corners with two equivalent Ge(1)O4 tetrahedra. Lu(1) is bonded in a 8-coordinate geometry to one O(1), three equivalent O(2), and four equivalent O(3) atoms. Ge(1) is bonded to four equivalent O(3) atoms to form GeO4 tetrahedra that share corners with four equivalent Be(1)O4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Be(1) and two equivalent Lu(1) atoms to form a mixture of distorted corner and edge-sharing OLu2Be2 tetrahedra. In the second O site, O(2) is bonded to one Be(1) and three equivalent Lu(1) atoms to form distorted OLu3Be tetrahedra that share corners with two equivalent O(1)Lu2Be2 tetrahedra, corners with four equivalent O(2)Lu3Be tetrahedra,  an edgeedge with one O(1)Lu2Be2 tetrahedra, and  an edgeedge with one O(2)Lu3Be tetrahedra. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Be(1), two equivalent Lu(1), and one Ge(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Lu2Be2GeO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.346
_cell_length_b   7.346
_cell_length_c   4.761
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   256.899
_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
  Lu  Lu0  1  0.158  0.342  0.506  1.0
  Lu  Lu1  1  0.842  0.658  0.506  1.0
  Lu  Lu2  1  0.658  0.158  0.494  1.0
  Lu  Lu3  1  0.342  0.842  0.494  1.0
  Be  Be4  1  0.636  0.864  0.947  1.0
  Be  Be5  1  0.364  0.136  0.947  1.0
  Be  Be6  1  0.136  0.636  0.053  1.0
  Be  Be7  1  0.864  0.364  0.053  1.0
  Ge  Ge8  1  0.000  0.000  0.000  1.0
  Ge  Ge9  1  0.500  0.500  0.000  1.0
  O  O10  1  0.000  0.500  0.196  1.0
  O  O11  1  0.500  0.000  0.804  1.0
  O  O12  1  0.643  0.857  0.281  1.0
  O  O13  1  0.357  0.143  0.281  1.0
  O  O14  1  0.143  0.643  0.719  1.0
  O  O15  1  0.857  0.357  0.719  1.0
  O  O16  1  0.083  0.830  0.225  1.0
  O  O17  1  0.917  0.170  0.225  1.0
  O  O18  1  0.170  0.083  0.775  1.0
  O  O19  1  0.417  0.330  0.775  1.0
  O  O20  1  0.830  0.917  0.775  1.0
  O  O21  1  0.583  0.670  0.775  1.0
  O  O22  1  0.330  0.583  0.225  1.0
  O  O23  1  0.670  0.417  0.225  1.0
[/CIF]
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The crystal structure described by Be2Lu2GeO7 crystallizes in the tetragonal P-42_1m space group. Be(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form BeO4 tetrahedra that share  a cornercorner with one Be(1)O4 tetrahedra and corners with two equivalent Ge(1)O4 tetrahedra. Lu(1) is bonded in a 8-coordinate geometry to one O(1), three equivalent O(2), and four equivalent O(3) atoms. Ge(1) is bonded to four equivalent O(3) atoms to form GeO4 tetrahedra that share corners with four equivalent Be(1)O4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Be(1) and two equivalent Lu(1) atoms to form a mixture of distorted corner and edge-sharing OLu2Be2 tetrahedra. In the second O site, O(2) is bonded to one Be(1) and three equivalent Lu(1) atoms to form distorted OLu3Be tetrahedra that share corners with two equivalent O(1)Lu2Be2 tetrahedra, corners with four equivalent O(2)Lu3Be tetrahedra,  an edgeedge with one O(1)Lu2Be2 tetrahedra, and  an edgeedge with one O(2)Lu3Be tetrahedra. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Be(1), two equivalent Lu(1), and one Ge(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Lu2Be2GeO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.346
_cell_length_b   7.346
_cell_length_c   4.761
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   256.899
_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
  Lu  Lu0  1  0.158  0.342  0.506  1.0
  Lu  Lu1  1  0.842  0.658  0.506  1.0
  Lu  Lu2  1  0.658  0.158  0.494  1.0
  Lu  Lu3  1  0.342  0.842  0.494  1.0
  Be  Be4  1  0.636  0.864  0.947  1.0
  Be  Be5  1  0.364  0.136  0.947  1.0
  Be  Be6  1  0.136  0.636  0.053  1.0
  Be  Be7  1  0.864  0.364  0.053  1.0
  Ge  Ge8  1  0.000  0.000  0.000  1.0
  Ge  Ge9  1  0.500  0.500  0.000  1.0
  O  O10  1  0.000  0.500  0.196  1.0
  O  O11  1  0.500  0.000  0.804  1.0
  O  O12  1  0.643  0.857  0.281  1.0
  O  O13  1  0.357  0.143  0.281  1.0
  O  O14  1  0.143  0.643  0.719  1.0
  O  O15  1  0.857  0.357  0.719  1.0
  O  O16  1  0.083  0.830  0.225  1.0
  O  O17  1  0.917  0.170  0.225  1.0
  O  O18  1  0.170  0.083  0.775  1.0
  O  O19  1  0.417  0.330  0.775  1.0
  O  O20  1  0.830  0.917  0.775  1.0
  O  O21  1  0.583  0.670  0.775  1.0
  O  O22  1  0.330  0.583  0.225  1.0
  O  O23  1  0.670  0.417  0.225  1.0
[/CIF]
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