The material described by Be2GeO4 crystallizes in the trigonal R-3 space group. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded to one O(2), one O(4), and two equivalent O(1) atoms to form BeO4 tetrahedra that share corners with two equivalent Be(1)O4 tetrahedra, corners with two equivalent Be(2)O4 tetrahedra, and corners with four equivalent Ge(1)O4 tetrahedra. In the second Be site, Be(2) is bonded to one O(2), one O(4), and two equivalent O(3) atoms to form BeO4 tetrahedra that share corners with two equivalent Be(1)O4 tetrahedra, corners with two equivalent Be(2)O4 tetrahedra, and corners with four equivalent Ge(1)O4 tetrahedra. Ge(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form GeO4 tetrahedra that share corners with four equivalent Be(1)O4 tetrahedra and corners with four equivalent Be(2)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to two equivalent Be(1) and one Ge(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Be(1), one Be(2), and one Ge(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to two equivalent Be(2) and one Ge(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Be(1), one Be(2), and one Ge(1) atom. is represented by the CIF card [CIF]
data_Be2GeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.887
_cell_length_b   7.887
_cell_length_c   7.887
_cell_angle_alpha   108.001
_cell_angle_beta   108.001
_cell_angle_gamma   108.001
_symmetry_Int_Tables_number   1
_cell_volume   396.947
_cell_formula_units_Z   6
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
  Be  Be0  1  0.293  0.890  0.069  1.0
  Be  Be1  1  0.931  0.707  0.110  1.0
  Be  Be2  1  0.395  0.629  0.220  1.0
  Be  Be3  1  0.110  0.931  0.707  1.0
  Be  Be4  1  0.780  0.605  0.371  1.0
  Be  Be5  1  0.371  0.780  0.605  1.0
  Be  Be6  1  0.629  0.220  0.395  1.0
  Be  Be7  1  0.220  0.395  0.629  1.0
  Be  Be8  1  0.890  0.069  0.293  1.0
  Be  Be9  1  0.605  0.371  0.780  1.0
  Be  Be10  1  0.069  0.293  0.890  1.0
  Be  Be11  1  0.707  0.110  0.931  1.0
  Ge  Ge12  1  0.731  0.962  0.555  1.0
  Ge  Ge13  1  0.445  0.269  0.038  1.0
  Ge  Ge14  1  0.038  0.445  0.269  1.0
  Ge  Ge15  1  0.962  0.555  0.731  1.0
  Ge  Ge16  1  0.555  0.731  0.962  1.0
  Ge  Ge17  1  0.269  0.038  0.445  1.0
  O  O18  1  0.805  0.835  0.135  1.0
  O  O19  1  0.409  0.752  0.088  1.0
  O  O20  1  0.165  0.865  0.195  1.0
  O  O21  1  0.248  0.912  0.591  1.0
  O  O22  1  0.480  0.789  0.456  1.0
  O  O23  1  0.169  0.456  0.125  1.0
  O  O24  1  0.875  0.831  0.544  1.0
  O  O25  1  0.912  0.591  0.248  1.0
  O  O26  1  0.544  0.520  0.211  1.0
  O  O27  1  0.211  0.544  0.520  1.0
  O  O28  1  0.865  0.195  0.165  1.0
  O  O29  1  0.544  0.875  0.831  1.0
  O  O30  1  0.456  0.125  0.169  1.0
  O  O31  1  0.135  0.805  0.835  1.0
  O  O32  1  0.789  0.456  0.480  1.0
  O  O33  1  0.456  0.480  0.789  1.0
  O  O34  1  0.088  0.409  0.752  1.0
  O  O35  1  0.125  0.169  0.456  1.0
  O  O36  1  0.831  0.544  0.875  1.0
  O  O37  1  0.520  0.211  0.544  1.0
  O  O38  1  0.752  0.088  0.409  1.0
  O  O39  1  0.835  0.135  0.805  1.0
  O  O40  1  0.591  0.248  0.912  1.0
  O  O41  1  0.195  0.165  0.865  1.0
[/CIF]
.
The material described by Be2GeO4 crystallizes in the trigonal R-3 space group. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded to one O(2), one O(4), and two equivalent O(1) atoms to form BeO4 tetrahedra that share corners with two equivalent Be(1)O4 tetrahedra, corners with two equivalent Be(2)O4 tetrahedra, and corners with four equivalent Ge(1)O4 tetrahedra. In the second Be site, Be(2) is bonded to one O(2), one O(4), and two equivalent O(3) atoms to form BeO4 tetrahedra that share corners with two equivalent Be(1)O4 tetrahedra, corners with two equivalent Be(2)O4 tetrahedra, and corners with four equivalent Ge(1)O4 tetrahedra. Ge(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form GeO4 tetrahedra that share corners with four equivalent Be(1)O4 tetrahedra and corners with four equivalent Be(2)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to two equivalent Be(1) and one Ge(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Be(1), one Be(2), and one Ge(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to two equivalent Be(2) and one Ge(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Be(1), one Be(2), and one Ge(1) atom. is represented by the CIF card [CIF]
data_Be2GeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.887
_cell_length_b   7.887
_cell_length_c   7.887
_cell_angle_alpha   108.001
_cell_angle_beta   108.001
_cell_angle_gamma   108.001
_symmetry_Int_Tables_number   1
_cell_volume   396.947
_cell_formula_units_Z   6
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
  Be  Be0  1  0.293  0.890  0.069  1.0
  Be  Be1  1  0.931  0.707  0.110  1.0
  Be  Be2  1  0.395  0.629  0.220  1.0
  Be  Be3  1  0.110  0.931  0.707  1.0
  Be  Be4  1  0.780  0.605  0.371  1.0
  Be  Be5  1  0.371  0.780  0.605  1.0
  Be  Be6  1  0.629  0.220  0.395  1.0
  Be  Be7  1  0.220  0.395  0.629  1.0
  Be  Be8  1  0.890  0.069  0.293  1.0
  Be  Be9  1  0.605  0.371  0.780  1.0
  Be  Be10  1  0.069  0.293  0.890  1.0
  Be  Be11  1  0.707  0.110  0.931  1.0
  Ge  Ge12  1  0.731  0.962  0.555  1.0
  Ge  Ge13  1  0.445  0.269  0.038  1.0
  Ge  Ge14  1  0.038  0.445  0.269  1.0
  Ge  Ge15  1  0.962  0.555  0.731  1.0
  Ge  Ge16  1  0.555  0.731  0.962  1.0
  Ge  Ge17  1  0.269  0.038  0.445  1.0
  O  O18  1  0.805  0.835  0.135  1.0
  O  O19  1  0.409  0.752  0.088  1.0
  O  O20  1  0.165  0.865  0.195  1.0
  O  O21  1  0.248  0.912  0.591  1.0
  O  O22  1  0.480  0.789  0.456  1.0
  O  O23  1  0.169  0.456  0.125  1.0
  O  O24  1  0.875  0.831  0.544  1.0
  O  O25  1  0.912  0.591  0.248  1.0
  O  O26  1  0.544  0.520  0.211  1.0
  O  O27  1  0.211  0.544  0.520  1.0
  O  O28  1  0.865  0.195  0.165  1.0
  O  O29  1  0.544  0.875  0.831  1.0
  O  O30  1  0.456  0.125  0.169  1.0
  O  O31  1  0.135  0.805  0.835  1.0
  O  O32  1  0.789  0.456  0.480  1.0
  O  O33  1  0.456  0.480  0.789  1.0
  O  O34  1  0.088  0.409  0.752  1.0
  O  O35  1  0.125  0.169  0.456  1.0
  O  O36  1  0.831  0.544  0.875  1.0
  O  O37  1  0.520  0.211  0.544  1.0
  O  O38  1  0.752  0.088  0.409  1.0
  O  O39  1  0.835  0.135  0.805  1.0
  O  O40  1  0.591  0.248  0.912  1.0
  O  O41  1  0.195  0.165  0.865  1.0
[/CIF]
.