The material described by BeO is beta beryllia structured and crystallizes in the tetragonal P4_2/mnm space group. Be(1) is bonded to four equivalent O(1) atoms to form a mixture of corner and edge-sharing BeO4 tetrahedra. O(1) is bonded to four equivalent Be(1) atoms to form a mixture of corner and edge-sharing OBe4 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_BeO
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.685
_cell_length_b   4.609
_cell_length_c   4.609
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   57.033
_cell_formula_units_Z   4
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  0.000  0.326  0.674  1.0
  Be  Be1  1  0.500  0.826  0.826  1.0
  Be  Be2  1  0.500  0.174  0.174  1.0
  Be  Be3  1  0.000  0.674  0.326  1.0
  O  O4  1  0.000  0.311  0.311  1.0
  O  O5  1  0.500  0.189  0.811  1.0
  O  O6  1  0.500  0.811  0.189  1.0
  O  O7  1  0.000  0.689  0.689  1.0
[/CIF]
.
The material described by BeO is beta beryllia structured and crystallizes in the tetragonal P4_2/mnm space group. Be(1) is bonded to four equivalent O(1) atoms to form a mixture of corner and edge-sharing BeO4 tetrahedra. O(1) is bonded to four equivalent Be(1) atoms to form a mixture of corner and edge-sharing OBe4 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_BeO
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.685
_cell_length_b   4.609
_cell_length_c   4.609
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   57.033
_cell_formula_units_Z   4
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  0.000  0.326  0.674  1.0
  Be  Be1  1  0.500  0.826  0.826  1.0
  Be  Be2  1  0.500  0.174  0.174  1.0
  Be  Be3  1  0.000  0.674  0.326  1.0
  O  O4  1  0.000  0.311  0.311  1.0
  O  O5  1  0.500  0.189  0.811  1.0
  O  O6  1  0.500  0.811  0.189  1.0
  O  O7  1  0.000  0.689  0.689  1.0
[/CIF]
.